Subtract 75/18 from 30/7, Solve 4 2/7

Subtract 75/18 from 30/7

1^st number: 4 2/7, 2^nd number: 4 3/18

30/7 - 75/18 is 5/42.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 7 × 18 = 126,
30/7 = 30 × 18/7 × 18 = 540/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
75/18 = 75 × 7/18 × 7 = 525/126
Subtract the two like fractions:
540/126 - 525/126 = 540 - 525/126 = 15/126
After reducing the fraction, the answer is 5/42

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