Subtract 21/18 from 35/90
1st number: 35/90, 2nd number: 1 3/18
35/90 - 21/18 is -7/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
35/90 = 35 × 1/90 × 1 = 35/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Subtract the two like fractions:
35/90 - 105/90 = 35 - 105/90 = -70/90 - After reducing the fraction, the answer is -7/9
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