Subtract 18/10 from 20/5, Solve 4 0/5

Subtract 18/10 from 20/5

1^st number: 4 0/5, 2^nd number: 1 8/10

20/5 - 18/10 is 11/5.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 10 is 10

Next, find the equivalent fraction of both fractional numbers with denominator 10
For the 1st fraction, since 5 × 2 = 10,
20/5 = 20 × 2/5 × 2 = 40/10
Likewise, for the 2nd fraction, since 10 × 1 = 10,
18/10 = 18 × 1/10 × 1 = 18/10
Subtract the two like fractions:
40/10 - 18/10 = 40 - 18/10 = 22/10
After reducing the fraction, the answer is 11/5
In mixed form: 21/5

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