Subtract 4/90 from 15/12
1st number: 1 3/12, 2nd number: 4/90
15/12 - 4/90 is 217/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
15/12 = 15 × 15/12 × 15 = 225/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
4/90 = 4 × 2/90 × 2 = 8/180 - Subtract the two like fractions:
225/180 - 8/180 = 225 - 8/180 = 217/180 - In mixed form: 137/180
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