Subtract 3/20 from 18/8
1st number: 2 2/8, 2nd number: 3/20
18/8 - 3/20 is 21/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
18/8 = 18 × 5/8 × 5 = 90/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
3/20 = 3 × 2/20 × 2 = 6/40 - Subtract the two like fractions:
90/40 - 6/40 = 90 - 6/40 = 84/40 - After reducing the fraction, the answer is 21/10
- In mixed form: 21/10
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