Subtract 21/36 from 84/42
1st number: 2 0/42, 2nd number: 21/36
84/42 - 21/36 is 17/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 42 × 6 = 252,
84/42 = 84 × 6/42 × 6 = 504/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
21/36 = 21 × 7/36 × 7 = 147/252 - Subtract the two like fractions:
504/252 - 147/252 = 504 - 147/252 = 357/252 - After reducing the fraction, the answer is 17/12
- In mixed form: 15/12
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