Subtract 42/75 from 15/20
15/20 - 42/75 is 19/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 75 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 20 × 15 = 300,
15/20 = 15 × 15/20 × 15 = 225/300 - Likewise, for the 2nd fraction, since 75 × 4 = 300,
42/75 = 42 × 4/75 × 4 = 168/300 - Subtract the two like fractions:
225/300 - 168/300 = 225 - 168/300 = 57/300 - After reducing the fraction, the answer is 19/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20-42/75 15/20-84/75 15/40-42/75 45/20-42/75 15/60-42/75 75/20-42/75