Subtract 81/36 from 7/90
1st number: 7/90, 2nd number: 2 9/36
7/90 - 81/36 is -391/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
7/90 = 7 × 2/90 × 2 = 14/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
81/36 = 81 × 5/36 × 5 = 405/180 - Subtract the two like fractions:
14/180 - 405/180 = 14 - 405/180 = -391/180
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