Subtract 60/81 from 28/90
28/90 - 60/81 is -58/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 90 × 9 = 810,
28/90 = 28 × 9/90 × 9 = 252/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
60/81 = 60 × 10/81 × 10 = 600/810 - Subtract the two like fractions:
252/810 - 600/810 = 252 - 600/810 = -348/810 - After reducing the fraction, the answer is -58/135
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