Subtract 18/20 from 42/8
1st number: 5 2/8, 2nd number: 18/20
42/8 - 18/20 is 87/20.
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,
42/8 = 42 × 5/8 × 5 = 210/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
18/20 = 18 × 2/20 × 2 = 36/40 - Subtract the two like fractions:
210/40 - 36/40 = 210 - 36/40 = 174/40 - After reducing the fraction, the answer is 87/20
- In mixed form: 47/20
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