Subtract 54/72 from 28/40
28/40 - 54/72 is -1/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
28/40 = 28 × 9/40 × 9 = 252/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
54/72 = 54 × 5/72 × 5 = 270/360 - Subtract the two like fractions:
252/360 - 270/360 = 252 - 270/360 = -18/360 - After reducing the fraction, the answer is -1/20
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