Subtract 21/20 from 30/24, Solve 1 6/24

Subtract 21/20 from 30/24

1^st number: 1 6/24, 2^nd number: 1 1/20

30/24 - 21/20 is 1/5.

Find the least common denominator or LCM of the two denominators:
LCM of 24 and 20 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 24 × 5 = 120,
30/24 = 30 × 5/24 × 5 = 150/120
Likewise, for the 2nd fraction, since 20 × 6 = 120,
21/20 = 21 × 6/20 × 6 = 126/120
Subtract the two like fractions:
150/120 - 126/120 = 150 - 126/120 = 24/120
After reducing the fraction, the answer is 1/5

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