Subtract 28/32 from 7/20
7/20 - 28/32 is -21/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 32 is 160
Next, find the equivalent fraction of both fractional numbers with denominator 160 - For the 1st fraction, since 20 × 8 = 160,
7/20 = 7 × 8/20 × 8 = 56/160 - Likewise, for the 2nd fraction, since 32 × 5 = 160,
28/32 = 28 × 5/32 × 5 = 140/160 - Subtract the two like fractions:
56/160 - 140/160 = 56 - 140/160 = -84/160 - After reducing the fraction, the answer is -21/40
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