Subtract 90/25 from 81/20
1st number: 4 1/20, 2nd number: 3 15/25
81/20 - 90/25 is 9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 25 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,
81/20 = 81 × 5/20 × 5 = 405/100 - Likewise, for the 2nd fraction, since 25 × 4 = 100,
90/25 = 90 × 4/25 × 4 = 360/100 - Subtract the two like fractions:
405/100 - 360/100 = 405 - 360/100 = 45/100 - After reducing the fraction, the answer is 9/20
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