Subtract 8/84 from 30/10, Solve 3 0/10

Subtract 8/84 from 30/10

1^st number: 3 0/10, 2^nd number: 8/84

30/10 - 8/84 is 61/21.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 10 × 42 = 420,
30/10 = 30 × 42/10 × 42 = 1260/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
8/84 = 8 × 5/84 × 5 = 40/420
Subtract the two like fractions:
1260/420 - 40/420 = 1260 - 40/420 = 1220/420
After reducing the fraction, the answer is 61/21
In mixed form: 219/21

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