Subtract 15/42 from 60/40
1st number: 1 20/40, 2nd number: 15/42
60/40 - 15/42 is 8/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
60/40 = 60 × 21/40 × 21 = 1260/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
15/42 = 15 × 20/42 × 20 = 300/840 - Subtract the two like fractions:
1260/840 - 300/840 = 1260 - 300/840 = 960/840 - After reducing the fraction, the answer is 8/7
- In mixed form: 11/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40-30/42 60/80-15/42 60/40-15/84 60/40-45/42 60/40-75/42