Subtract 72/80 from 8/15
8/15 - 72/80 is -11/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
8/15 = 8 × 16/15 × 16 = 128/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
72/80 = 72 × 3/80 × 3 = 216/240 - Subtract the two like fractions:
128/240 - 216/240 = 128 - 216/240 = -88/240 - After reducing the fraction, the answer is -11/30
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