Subtract 70/21 from 45/36
1st number: 1 9/36, 2nd number: 3 7/21
45/36 - 70/21 is -25/12.
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,
45/36 = 45 × 7/36 × 7 = 315/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
70/21 = 70 × 12/21 × 12 = 840/252 - Subtract the two like fractions:
315/252 - 840/252 = 315 - 840/252 = -525/252 - After reducing the fraction, the answer is -25/12
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