Subtract 20/63 from 42/21
1st number: 2 0/21, 2nd number: 20/63
42/21 - 20/63 is 106/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
42/21 = 42 × 3/21 × 3 = 126/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
20/63 = 20 × 1/63 × 1 = 20/63 - Subtract the two like fractions:
126/63 - 20/63 = 126 - 20/63 = 106/63 - In mixed form: 143/63
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