Subtract 18/50 from 42/20
1st number: 2 2/20, 2nd number: 18/50
42/20 - 18/50 is 87/50.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 50 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,
42/20 = 42 × 5/20 × 5 = 210/100 - Likewise, for the 2nd fraction, since 50 × 2 = 100,
18/50 = 18 × 2/50 × 2 = 36/100 - Subtract the two like fractions:
210/100 - 36/100 = 210 - 36/100 = 174/100 - After reducing the fraction, the answer is 87/50
- In mixed form: 137/50
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