Subtract 21/25 from 90/20
1st number: 4 10/20, 2nd number: 21/25
90/20 - 21/25 is 183/50.
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,
90/20 = 90 × 5/20 × 5 = 450/100 - Likewise, for the 2nd fraction, since 25 × 4 = 100,
21/25 = 21 × 4/25 × 4 = 84/100 - Subtract the two like fractions:
450/100 - 84/100 = 450 - 84/100 = 366/100 - After reducing the fraction, the answer is 183/50
- In mixed form: 333/50
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