how do you subtract fractions bbc bitesize?
43049
Remember, you can only add and subtract fractions when the bottom numbers, or denominators, are the same. So, to add or subtract fractions: Change the fractions so they have the same denominator. Add or subtract the top numbers, or numerators.
79003
['Find the lowest common multiple of the denominators. ... ', 'Convert each fraction to an equivalent fraction that has the LCD as its denominator. ... ', 'Add the numerators and place over the common denominator.', 'Simplify the result by reducing it to lowest terms.']
941560
['input fractions, mixed numbers or whole numbers;', 'select. "+" - for addition fractions, "-" - for subtraction fractions, "×" - for multiplication fractions, "÷" - for division fractions;', 'press button ( "=" ).']
353486
['The bottom numbers (the denominators) are already the same. Go straight to step 2.', 'Add the top numbers and put the answer over the same denominator:', 'Simplify the fraction:', 'Step 1: The bottom numbers are different. ... ', 'Step 2: Add the top numbers and put them over the same denominator:', 'Step 3: Simplify the fraction:']
1029909
['Write the numbers so each place value lines up vertically.', 'Subtract the digits in each place value. Work from right to left starting with the ones place. ... ', 'Continue subtracting each place value from right to left, borrowing if needed.', 'Check by adding.']
63991
Then stick the negative sign to your answer. When subtracting negative fractions, you are, in effect, adding the positive complement of the negative fraction you are subtracting, because subtracting a negative number or fraction is the same as adding the positive of that negative fraction or number.
338172
Since you're trying to subtract a larger fraction from a smaller one, you need to "borrow" a one from the integer 4, change it to 15/15, and add it to the fraction. Now the problem becomes 3 20/15 minus 3 9/15 and the answer is 11/15.
1404613
In other words, multiply by 100 percent minus the percentage you want to subtract, in decimal form. To subtract 20 percent, multiply by 80 percent (0.8). To subtract 30 percent, multiply the number by 70 percent (0.7).
183718
Write both fractions as equivalent fractions with a denominator of 15. Since you're trying to subtract a larger fraction from a smaller one, you need to "borrow" a one from the integer 4, change it to 15/15, and add it to the fraction. Now the problem becomes 3 20/15 minus 3 9/15 and the answer is 11/15.
1413668
['Adding Fractions,', 'Subtracting Fractions,', 'Multiplying Fractions and.', 'Dividing Fractions.']
950237
['Add or Subtract the same value from both sides.', 'Clear out any fractions by Multiplying every term by the bottom parts.', 'Divide every term by the same nonzero value.', 'Combine Like Terms.', 'Factoring.', 'Expanding (the opposite of factoring) may also help.']
557933
['Subtract 1 from the whole number part of the mixed number being subtracted.', 'Add that 1 to the fraction part to make an improper fraction. For example, .', 'Then, subtract as with any other mixed numbers.']
332696
['Step 1: Write down the decimal divided by 1, like this: decimal 1.', 'Step 2: Multiply both top and bottom by 10 for every number after the decimal point. ... ', 'Step 3: Simplify (or reduce) the fraction.']
39071
['Find a common denominator by multiplying the two denominators together.', 'Manipulate the fractions so that they both have the common denominator.', 'Once you have a common denominator in both fractions, subtract the numerators.']
1029117
Subtracting a Mixed Number From a Whole Number: Fraction Series - learn how to subtract a mixed number from a whole number. Method: convert the top number into fraction form; subtract the whole numbers; subtract the numerators; keep the denominator.
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Subtraction of Algebraic Fractions. To subtract algebraic fractions, first express them in terms of their Lowest Common Denominator (LCD) and then subtract their numerators to obtain the numerator that is divided by the LCD to arrive at the answer.
1024336
['Leave the first fraction in the equation alone.', 'Turn the division sign into a multiplication sign.', 'Flip the second fraction over (find its reciprocal).', 'Multiply the numerators (top numbers) of the two fractions together. ... ', 'Multiply the denominators (bottom numbers) of the two fractions together.']