Subtract 42/50 from 3/20
3/20 - 42/50 is -69/100.
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,
3/20 = 3 × 5/20 × 5 = 15/100 - Likewise, for the 2nd fraction, since 50 × 2 = 100,
42/50 = 42 × 2/50 × 2 = 84/100 - Subtract the two like fractions:
15/100 - 84/100 = 15 - 84/100 = -69/100
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