Subtract 18/20 from 30/10
1st number: 3 0/10, 2nd number: 18/20
30/10 - 18/20 is 21/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
30/10 = 30 × 2/10 × 2 = 60/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
18/20 = 18 × 1/20 × 1 = 18/20 - Subtract the two like fractions:
60/20 - 18/20 = 60 - 18/20 = 42/20 - After reducing the fraction, the answer is 21/10
- In mixed form: 21/10
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