Subtract 9/80 from 81/10
1st number: 8 1/10, 2nd number: 9/80
81/10 - 9/80 is 639/80.
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,
81/10 = 81 × 8/10 × 8 = 648/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
9/80 = 9 × 1/80 × 1 = 9/80 - Subtract the two like fractions:
648/80 - 9/80 = 648 - 9/80 = 639/80 - In mixed form: 779/80
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