Subtract 21/63 from 45/42
1st number: 1 3/42, 2nd number: 21/63
45/42 - 21/63 is 31/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
45/42 = 45 × 3/42 × 3 = 135/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
21/63 = 21 × 2/63 × 2 = 42/126 - Subtract the two like fractions:
135/126 - 42/126 = 135 - 42/126 = 93/126 - After reducing the fraction, the answer is 31/42
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