Subtract 81/10 from 90/4
1st number: 22 2/4, 2nd number: 8 1/10
90/4 - 81/10 is 72/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 10 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
90/4 = 90 × 5/4 × 5 = 450/20 - Likewise, for the 2nd fraction, since 10 × 2 = 20,
81/10 = 81 × 2/10 × 2 = 162/20 - Subtract the two like fractions:
450/20 - 162/20 = 450 - 162/20 = 288/20 - After reducing the fraction, the answer is 72/5
- In mixed form: 142/5
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