Subtract 18/5 from 21/10
1st number: 2 1/10, 2nd number: 3 3/5
21/10 - 18/5 is -3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 5 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 10 × 1 = 10,
21/10 = 21 × 1/10 × 1 = 21/10 - Likewise, for the 2nd fraction, since 5 × 2 = 10,
18/5 = 18 × 2/5 × 2 = 36/10 - Subtract the two like fractions:
21/10 - 36/10 = 21 - 36/10 = -15/10 - After reducing the fraction, the answer is -3/2
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