Subtract 42/10 from 21/63
1st number: 21/63, 2nd number: 4 2/10
21/63 - 42/10 is -58/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 10 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
21/63 = 21 × 10/63 × 10 = 210/630 - Likewise, for the 2nd fraction, since 10 × 63 = 630,
42/10 = 42 × 63/10 × 63 = 2646/630 - Subtract the two like fractions:
210/630 - 2646/630 = 210 - 2646/630 = -2436/630 - After reducing the fraction, the answer is -58/15
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