Subtract 15/18 from 42/60
42/60 - 15/18 is -2/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
42/60 = 42 × 3/60 × 3 = 126/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
15/18 = 15 × 10/18 × 10 = 150/180 - Subtract the two like fractions:
126/180 - 150/180 = 126 - 150/180 = -24/180 - After reducing the fraction, the answer is -2/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/60-15/18 42/60-30/18 42/60-15/36 42/60-45/18 42/60-15/54 42/60-75/18 42/60-15/90