Subtract 15/7 from 45/20
1st number: 2 5/20, 2nd number: 2 1/7
45/20 - 15/7 is 3/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
45/20 = 45 × 7/20 × 7 = 315/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
15/7 = 15 × 20/7 × 20 = 300/140 - Subtract the two like fractions:
315/140 - 300/140 = 315 - 300/140 = 15/140 - After reducing the fraction, the answer is 3/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-15/7 45/20-30/7 45/40-15/7 45/20-15/14 45/20-45/7 45/60-15/7 45/20-15/21 45/20-75/7 45/20-15/35 45/20-15/49