Subtract 21/63 from 81/30
1st number: 2 21/30, 2nd number: 21/63
81/30 - 21/63 is 71/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 30 × 21 = 630,
81/30 = 81 × 21/30 × 21 = 1701/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
21/63 = 21 × 10/63 × 10 = 210/630 - Subtract the two like fractions:
1701/630 - 210/630 = 1701 - 210/630 = 1491/630 - After reducing the fraction, the answer is 71/30
- In mixed form: 211/30
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