Subtract 4/84 from 90/10, Solve 9 0/10

Subtract 4/84 from 90/10

1^st number: 9 0/10, 2^nd number: 4/84

90/10 - 4/84 is 188/21.

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,
90/10 = 90 × 42/10 × 42 = 3780/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
4/84 = 4 × 5/84 × 5 = 20/420
Subtract the two like fractions:
3780/420 - 20/420 = 3780 - 20/420 = 3760/420
After reducing the fraction, the answer is 188/21
In mixed form: 820/21

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