Subtract 21/90 from 3/36
3/36 - 21/90 is -3/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
3/36 = 3 × 5/36 × 5 = 15/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
21/90 = 21 × 2/90 × 2 = 42/180 - Subtract the two like fractions:
15/180 - 42/180 = 15 - 42/180 = -27/180 - After reducing the fraction, the answer is -3/20
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