Subtract 1/36 from 42/21
1st number: 2 0/21, 2nd number: 1/36
42/21 - 1/36 is 71/36.
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,
42/21 = 42 × 12/21 × 12 = 504/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
1/36 = 1 × 7/36 × 7 = 7/252 - Subtract the two like fractions:
504/252 - 7/252 = 504 - 7/252 = 497/252 - After reducing the fraction, the answer is 71/36
- In mixed form: 135/36
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