Subtract 27/7 from 21/63
1st number: 21/63, 2nd number: 3 6/7
21/63 - 27/7 is -74/21.
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,
21/63 = 21 × 1/63 × 1 = 21/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
27/7 = 27 × 9/7 × 9 = 243/63 - Subtract the two like fractions:
21/63 - 243/63 = 21 - 243/63 = -222/63 - After reducing the fraction, the answer is -74/21
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