Subtract 21/4 from 90/63
1st number: 1 27/63, 2nd number: 5 1/4
90/63 - 21/4 is -107/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 4 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
90/63 = 90 × 4/63 × 4 = 360/252 - Likewise, for the 2nd fraction, since 4 × 63 = 252,
21/4 = 21 × 63/4 × 63 = 1323/252 - Subtract the two like fractions:
360/252 - 1323/252 = 360 - 1323/252 = -963/252 - After reducing the fraction, the answer is -107/28
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