Subtract 21/5 from 75/20
1st number: 3 15/20, 2nd number: 4 1/5
75/20 - 21/5 is -9/20.
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,
75/20 = 75 × 1/20 × 1 = 75/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
21/5 = 21 × 4/5 × 4 = 84/20 - Subtract the two like fractions:
75/20 - 84/20 = 75 - 84/20 = -9/20
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