Subtract 45/30 from 20/7
1st number: 2 6/7, 2nd number: 1 15/30
20/7 - 45/30 is 19/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
20/7 = 20 × 30/7 × 30 = 600/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
45/30 = 45 × 7/30 × 7 = 315/210 - Subtract the two like fractions:
600/210 - 315/210 = 600 - 315/210 = 285/210 - After reducing the fraction, the answer is 19/14
- In mixed form: 15/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/7-45/30 20/7-90/30 20/14-45/30 20/7-45/60 60/7-45/30 20/21-45/30 20/7-45/90 20/35-45/30 20/49-45/30