Subtract 25/40 from 21/36
21/36 - 25/40 is -1/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 36 × 10 = 360,
21/36 = 21 × 10/36 × 10 = 210/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
25/40 = 25 × 9/40 × 9 = 225/360 - Subtract the two like fractions:
210/360 - 225/360 = 210 - 225/360 = -15/360 - After reducing the fraction, the answer is -1/24
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