Subtract 28/72 from 15/90
15/90 - 28/72 is -2/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
15/90 = 15 × 4/90 × 4 = 60/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
28/72 = 28 × 5/72 × 5 = 140/360 - Subtract the two like fractions:
60/360 - 140/360 = 60 - 140/360 = -80/360 - After reducing the fraction, the answer is -2/9
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