Subtract 20/84 from 75/9, Solve 8 3/9

Subtract 20/84 from 75/9

1^st number: 8 3/9, 2^nd number: 20/84

75/9 - 20/84 is 170/21.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 84 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 9 × 28 = 252,
75/9 = 75 × 28/9 × 28 = 2100/252
Likewise, for the 2nd fraction, since 84 × 3 = 252,
20/84 = 20 × 3/84 × 3 = 60/252
Subtract the two like fractions:
2100/252 - 60/252 = 2100 - 60/252 = 2040/252
After reducing the fraction, the answer is 170/21
In mixed form: 82/21

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