Subtract 90/40 from 25/81
1st number: 25/81, 2nd number: 2 10/40
25/81 - 90/40 is -629/324.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 40 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 81 × 40 = 3240,
25/81 = 25 × 40/81 × 40 = 1000/3240 - Likewise, for the 2nd fraction, since 40 × 81 = 3240,
90/40 = 90 × 81/40 × 81 = 7290/3240 - Subtract the two like fractions:
1000/3240 - 7290/3240 = 1000 - 7290/3240 = -6290/3240 - After reducing the fraction, the answer is -629/324
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