Subtract 42/20 from 21/32
1st number: 21/32, 2nd number: 2 2/20
21/32 - 42/20 is -231/160.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 20 is 160
Next, find the equivalent fraction of both fractional numbers with denominator 160 - For the 1st fraction, since 32 × 5 = 160,
21/32 = 21 × 5/32 × 5 = 105/160 - Likewise, for the 2nd fraction, since 20 × 8 = 160,
42/20 = 42 × 8/20 × 8 = 336/160 - Subtract the two like fractions:
105/160 - 336/160 = 105 - 336/160 = -231/160
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