Subtract 21/10 from 8/5
1st number: 1 3/5, 2nd number: 2 1/10
8/5 - 21/10 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 10 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 5 × 2 = 10,
8/5 = 8 × 2/5 × 2 = 16/10 - Likewise, for the 2nd fraction, since 10 × 1 = 10,
21/10 = 21 × 1/10 × 1 = 21/10 - Subtract the two like fractions:
16/10 - 21/10 = 16 - 21/10 = -5/10 - After reducing the fraction, the answer is -1/2
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