Subtract 42/8 from 30/7
1st number: 4 2/7, 2nd number: 5 2/8
30/7 - 42/8 is -27/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
30/7 = 30 × 8/7 × 8 = 240/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
42/8 = 42 × 7/8 × 7 = 294/56 - Subtract the two like fractions:
240/56 - 294/56 = 240 - 294/56 = -54/56 - After reducing the fraction, the answer is -27/28
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