Subtract 30/20 from 18/5
1st number: 3 3/5, 2nd number: 1 10/20
18/5 - 30/20 is 21/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 5 × 4 = 20,
18/5 = 18 × 4/5 × 4 = 72/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
30/20 = 30 × 1/20 × 1 = 30/20 - Subtract the two like fractions:
72/20 - 30/20 = 72 - 30/20 = 42/20 - After reducing the fraction, the answer is 21/10
- In mixed form: 21/10
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