Subtract 90/48 from 21/28
1st number: 21/28, 2nd number: 1 42/48
21/28 - 90/48 is -9/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 48 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 28 × 12 = 336,
21/28 = 21 × 12/28 × 12 = 252/336 - Likewise, for the 2nd fraction, since 48 × 7 = 336,
90/48 = 90 × 7/48 × 7 = 630/336 - Subtract the two like fractions:
252/336 - 630/336 = 252 - 630/336 = -378/336 - After reducing the fraction, the answer is -9/8
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