Subtract 20/7 from 42/63
1st number: 42/63, 2nd number: 2 6/7
42/63 - 20/7 is -46/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
42/63 = 42 × 1/63 × 1 = 42/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
20/7 = 20 × 9/7 × 9 = 180/63 - Subtract the two like fractions:
42/63 - 180/63 = 42 - 180/63 = -138/63 - After reducing the fraction, the answer is -46/21
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