Subtract 72/90 from 9/12
9/12 - 72/90 is -1/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
9/12 = 9 × 15/12 × 15 = 135/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
72/90 = 72 × 2/90 × 2 = 144/180 - Subtract the two like fractions:
135/180 - 144/180 = 135 - 144/180 = -9/180 - After reducing the fraction, the answer is -1/20
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