Subtract 42/32 from 15/20
1st number: 15/20, 2nd number: 1 10/32
15/20 - 42/32 is -9/16.
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,
15/20 = 15 × 8/20 × 8 = 120/160 - Likewise, for the 2nd fraction, since 32 × 5 = 160,
42/32 = 42 × 5/32 × 5 = 210/160 - Subtract the two like fractions:
120/160 - 210/160 = 120 - 210/160 = -90/160 - After reducing the fraction, the answer is -9/16
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