Subtract 25/90 from 15/80
15/80 - 25/90 is -13/144.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
15/80 = 15 × 9/80 × 9 = 135/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
25/90 = 25 × 8/90 × 8 = 200/720 - Subtract the two like fractions:
135/720 - 200/720 = 135 - 200/720 = -65/720 - After reducing the fraction, the answer is -13/144
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