Subtract 21/12 from 3/90
1st number: 3/90, 2nd number: 1 9/12
3/90 - 21/12 is -103/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
3/90 = 3 × 2/90 × 2 = 6/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
21/12 = 21 × 15/12 × 15 = 315/180 - Subtract the two like fractions:
6/180 - 315/180 = 6 - 315/180 = -309/180 - After reducing the fraction, the answer is -103/60
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