Subtract 21/49 from 5/15
5/15 - 21/49 is -2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 49 is 735
Next, find the equivalent fraction of both fractional numbers with denominator 735 - For the 1st fraction, since 15 × 49 = 735,
5/15 = 5 × 49/15 × 49 = 245/735 - Likewise, for the 2nd fraction, since 49 × 15 = 735,
21/49 = 21 × 15/49 × 15 = 315/735 - Subtract the two like fractions:
245/735 - 315/735 = 245 - 315/735 = -70/735 - After reducing the fraction, the answer is -2/21
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