Subtract 12/15 from 7/90
7/90 - 12/15 is -13/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
7/90 = 7 × 1/90 × 1 = 7/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
12/15 = 12 × 6/15 × 6 = 72/90 - Subtract the two like fractions:
7/90 - 72/90 = 7 - 72/90 = -65/90 - After reducing the fraction, the answer is -13/18
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