Subtract 7/8 from 42/15
1st number: 2 12/15, 2nd number: 7/8
42/15 - 7/8 is 77/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
42/15 = 42 × 8/15 × 8 = 336/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
7/8 = 7 × 15/8 × 15 = 105/120 - Subtract the two like fractions:
336/120 - 105/120 = 336 - 105/120 = 231/120 - After reducing the fraction, the answer is 77/40
- In mixed form: 137/40
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