Subtract 15/25 from 90/20
1st number: 4 10/20, 2nd number: 15/25
90/20 - 15/25 is 39/10.
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,
15/25 = 15 × 4/25 × 4 = 60/100 - Subtract the two like fractions:
450/100 - 60/100 = 450 - 60/100 = 390/100 - After reducing the fraction, the answer is 39/10
- In mixed form: 39/10
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