Subtract 42/56 from 21/15
1st number: 1 6/15, 2nd number: 42/56
21/15 - 42/56 is 13/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 15 × 56 = 840,
21/15 = 21 × 56/15 × 56 = 1176/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
42/56 = 42 × 15/56 × 15 = 630/840 - Subtract the two like fractions:
1176/840 - 630/840 = 1176 - 630/840 = 546/840 - After reducing the fraction, the answer is 13/20
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