Subtract 4/84 from 28/10, Solve 2 8/10

Subtract 4/84 from 28/10

1^st number: 2 8/10, 2^nd number: 4/84

28/10 - 4/84 is 289/105.

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,
28/10 = 28 × 42/10 × 42 = 1176/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
4/84 = 4 × 5/84 × 5 = 20/420
Subtract the two like fractions:
1176/420 - 20/420 = 1176 - 20/420 = 1156/420
After reducing the fraction, the answer is 289/105
In mixed form: 279/105

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