Subtract 7/40 from 7/72
7/72 - 7/40 is -7/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
7/72 = 7 × 5/72 × 5 = 35/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
7/40 = 7 × 9/40 × 9 = 63/360 - Subtract the two like fractions:
35/360 - 63/360 = 35 - 63/360 = -28/360 - After reducing the fraction, the answer is -7/90
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