Subtract 21/9 from 32/20
1st number: 1 12/20, 2nd number: 2 3/9
32/20 - 21/9 is -11/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
32/20 = 32 × 9/20 × 9 = 288/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
21/9 = 21 × 20/9 × 20 = 420/180 - Subtract the two like fractions:
288/180 - 420/180 = 288 - 420/180 = -132/180 - After reducing the fraction, the answer is -11/15
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