Subtract 8/21 from 72/36
1st number: 2 0/36, 2nd number: 8/21
72/36 - 8/21 is 34/21.
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,
72/36 = 72 × 7/36 × 7 = 504/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
8/21 = 8 × 12/21 × 12 = 96/252 - Subtract the two like fractions:
504/252 - 96/252 = 504 - 96/252 = 408/252 - After reducing the fraction, the answer is 34/21
- In mixed form: 113/21
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