Subtract 10/20 from 21/15
1st number: 1 6/15, 2nd number: 10/20
21/15 - 10/20 is 9/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
21/15 = 21 × 4/15 × 4 = 84/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
10/20 = 10 × 3/20 × 3 = 30/60 - Subtract the two like fractions:
84/60 - 30/60 = 84 - 30/60 = 54/60 - After reducing the fraction, the answer is 9/10
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