Subtract 42/48 from 5/7
5/7 - 42/48 is -9/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 48 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 7 × 48 = 336,
5/7 = 5 × 48/7 × 48 = 240/336 - Likewise, for the 2nd fraction, since 48 × 7 = 336,
42/48 = 42 × 7/48 × 7 = 294/336 - Subtract the two like fractions:
240/336 - 294/336 = 240 - 294/336 = -54/336 - After reducing the fraction, the answer is -9/56
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