Subtract 21/15 from 10/18
1st number: 10/18, 2nd number: 1 6/15
10/18 - 21/15 is -38/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
10/18 = 10 × 5/18 × 5 = 50/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
21/15 = 21 × 6/15 × 6 = 126/90 - Subtract the two like fractions:
50/90 - 126/90 = 50 - 126/90 = -76/90 - After reducing the fraction, the answer is -38/45
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