Subtract 10/21 from 90/36
1st number: 2 18/36, 2nd number: 10/21
90/36 - 10/21 is 85/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
90/36 = 90 × 7/36 × 7 = 630/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
10/21 = 10 × 12/21 × 12 = 120/252 - Subtract the two like fractions:
630/252 - 120/252 = 630 - 120/252 = 510/252 - After reducing the fraction, the answer is 85/42
- In mixed form: 21/42
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