Subtract 40/36 from 90/21
1st number: 4 6/21, 2nd number: 1 4/36
90/21 - 40/36 is 200/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
90/21 = 90 × 12/21 × 12 = 1080/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
40/36 = 40 × 7/36 × 7 = 280/252 - Subtract the two like fractions:
1080/252 - 280/252 = 1080 - 280/252 = 800/252 - After reducing the fraction, the answer is 200/63
- In mixed form: 311/63
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