Subtract 18/80 from 72/10
1st number: 7 2/10, 2nd number: 18/80
72/10 - 18/80 is 279/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 10 × 8 = 80,
72/10 = 72 × 8/10 × 8 = 576/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
18/80 = 18 × 1/80 × 1 = 18/80 - Subtract the two like fractions:
576/80 - 18/80 = 576 - 18/80 = 558/80 - After reducing the fraction, the answer is 279/40
- In mixed form: 639/40
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