Subtract 80/30 from 81/7
1st number: 11 4/7, 2nd number: 2 20/30
81/7 - 80/30 is 187/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
81/7 = 81 × 30/7 × 30 = 2430/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
80/30 = 80 × 7/30 × 7 = 560/210 - Subtract the two like fractions:
2430/210 - 560/210 = 2430 - 560/210 = 1870/210 - After reducing the fraction, the answer is 187/21
- In mixed form: 819/21
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