Subtract 30/84 from 30/20, Solve 1 10/20

Subtract 30/84 from 30/20

1^st number: 1 10/20, 2^nd number: 30/84

30/20 - 30/84 is 8/7.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 20 × 21 = 420,
30/20 = 30 × 21/20 × 21 = 630/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
30/84 = 30 × 5/84 × 5 = 150/420
Subtract the two like fractions:
630/420 - 150/420 = 630 - 150/420 = 480/420
After reducing the fraction, the answer is 8/7
In mixed form: 11/7

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