Subtract 42/49 from 7/28
7/28 - 42/49 is -17/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 49 is 196
Next, find the equivalent fraction of both fractional numbers with denominator 196 - For the 1st fraction, since 28 × 7 = 196,
7/28 = 7 × 7/28 × 7 = 49/196 - Likewise, for the 2nd fraction, since 49 × 4 = 196,
42/49 = 42 × 4/49 × 4 = 168/196 - Subtract the two like fractions:
49/196 - 168/196 = 49 - 168/196 = -119/196 - After reducing the fraction, the answer is -17/28
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