Subtract 27/10 from 21/18
1st number: 1 3/18, 2nd number: 2 7/10
21/18 - 27/10 is -23/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
27/10 = 27 × 9/10 × 9 = 243/90 - Subtract the two like fractions:
105/90 - 243/90 = 105 - 243/90 = -138/90 - After reducing the fraction, the answer is -23/15
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