Subtract 3/30 from 81/7, Solve 11 4/7

Subtract 3/30 from 81/7

1^st number: 11 4/7, 2^nd number: 3/30

81/7 - 3/30 is 803/70.

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,
3/30 = 3 × 7/30 × 7 = 21/210
Subtract the two like fractions:
2430/210 - 21/210 = 2430 - 21/210 = 2409/210
After reducing the fraction, the answer is 803/70
In mixed form: 1133/70

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