Subtract 72/96 from 21/70
21/70 - 72/96 is -9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 96 is 3360
Next, find the equivalent fraction of both fractional numbers with denominator 3360 - For the 1st fraction, since 70 × 48 = 3360,
21/70 = 21 × 48/70 × 48 = 1008/3360 - Likewise, for the 2nd fraction, since 96 × 35 = 3360,
72/96 = 72 × 35/96 × 35 = 2520/3360 - Subtract the two like fractions:
1008/3360 - 2520/3360 = 1008 - 2520/3360 = -1512/3360 - After reducing the fraction, the answer is -9/20
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