Subtract 56/72 from 18/45
18/45 - 56/72 is -17/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
18/45 = 18 × 8/45 × 8 = 144/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
56/72 = 56 × 5/72 × 5 = 280/360 - Subtract the two like fractions:
144/360 - 280/360 = 144 - 280/360 = -136/360 - After reducing the fraction, the answer is -17/45
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