Subtract 4/12 from 1/90
1/90 - 4/12 is -29/90.
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,
1/90 = 1 × 2/90 × 2 = 2/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
4/12 = 4 × 15/12 × 15 = 60/180 - Subtract the two like fractions:
2/180 - 60/180 = 2 - 60/180 = -58/180 - After reducing the fraction, the answer is -29/90
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