Subtract 21/30 from 8/2, Solve 4 0/2

Subtract 21/30 from 8/2

1^st number: 4 0/2, 2^nd number: 21/30

8/2 - 21/30 is 33/10.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 30 is 30

Next, find the equivalent fraction of both fractional numbers with denominator 30
For the 1st fraction, since 2 × 15 = 30,
8/2 = 8 × 15/2 × 15 = 120/30
Likewise, for the 2nd fraction, since 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30
Subtract the two like fractions:
120/30 - 21/30 = 120 - 21/30 = 99/30
After reducing the fraction, the answer is 33/10
In mixed form: 33/10

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