Subtract 21/96 from 3/40
3/40 - 21/96 is -23/160.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 96 is 480
Next, find the equivalent fraction of both fractional numbers with denominator 480 - For the 1st fraction, since 40 × 12 = 480,
3/40 = 3 × 12/40 × 12 = 36/480 - Likewise, for the 2nd fraction, since 96 × 5 = 480,
21/96 = 21 × 5/96 × 5 = 105/480 - Subtract the two like fractions:
36/480 - 105/480 = 36 - 105/480 = -69/480 - After reducing the fraction, the answer is -23/160
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