Subtract 18/4 from 84/10, Solve 8 4/10

Subtract 18/4 from 84/10

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

84/10 - 18/4 is 39/10.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 4 is 20

Next, find the equivalent fraction of both fractional numbers with denominator 20
For the 1st fraction, since 10 × 2 = 20,
84/10 = 84 × 2/10 × 2 = 168/20
Likewise, for the 2nd fraction, since 4 × 5 = 20,
18/4 = 18 × 5/4 × 5 = 90/20
Subtract the two like fractions:
168/20 - 90/20 = 168 - 90/20 = 78/20
After reducing the fraction, the answer is 39/10
In mixed form: 39/10

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