Subtract 63/36 from 70/21
1st number: 3 7/21, 2nd number: 1 27/36
70/21 - 63/36 is 19/12.
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,
70/21 = 70 × 12/21 × 12 = 840/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
63/36 = 63 × 7/36 × 7 = 441/252 - Subtract the two like fractions:
840/252 - 441/252 = 840 - 441/252 = 399/252 - After reducing the fraction, the answer is 19/12
- In mixed form: 17/12
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