Subtract 45/5 from 21/20
1st number: 1 1/20, 2nd number: 9 0/5
21/20 - 45/5 is -159/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
21/20 = 21 × 1/20 × 1 = 21/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
45/5 = 45 × 4/5 × 4 = 180/20 - Subtract the two like fractions:
21/20 - 180/20 = 21 - 180/20 = -159/20
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