Subtract 12/18 from 7/40
7/40 - 12/18 is -59/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 18 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
7/40 = 7 × 9/40 × 9 = 63/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
12/18 = 12 × 20/18 × 20 = 240/360 - Subtract the two like fractions:
63/360 - 240/360 = 63 - 240/360 = -177/360 - After reducing the fraction, the answer is -59/120
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