Subtract 21/7 from 9/63
1st number: 9/63, 2nd number: 3 0/7
9/63 - 21/7 is -20/7.
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,
9/63 = 9 × 1/63 × 1 = 9/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
21/7 = 21 × 9/7 × 9 = 189/63 - Subtract the two like fractions:
9/63 - 189/63 = 9 - 189/63 = -180/63 - After reducing the fraction, the answer is -20/7
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