Subtract 90/40 from 72/10
1st number: 7 2/10, 2nd number: 2 10/40
72/10 - 90/40 is 99/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
72/10 = 72 × 4/10 × 4 = 288/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
90/40 = 90 × 1/40 × 1 = 90/40 - Subtract the two like fractions:
288/40 - 90/40 = 288 - 90/40 = 198/40 - After reducing the fraction, the answer is 99/20
- In mixed form: 419/20
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