Subtract 28/30 from 25/81
25/81 - 28/30 is -253/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 30 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
25/81 = 25 × 10/81 × 10 = 250/810 - Likewise, for the 2nd fraction, since 30 × 27 = 810,
28/30 = 28 × 27/30 × 27 = 756/810 - Subtract the two like fractions:
250/810 - 756/810 = 250 - 756/810 = -506/810 - After reducing the fraction, the answer is -253/405
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