Subtract 7/45 from 20/7
1st number: 2 6/7, 2nd number: 7/45
20/7 - 7/45 is 851/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
20/7 = 20 × 45/7 × 45 = 900/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
7/45 = 7 × 7/45 × 7 = 49/315 - Subtract the two like fractions:
900/315 - 49/315 = 900 - 49/315 = 851/315 - In mixed form: 2221/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/7-7/45 20/7-14/45 20/14-7/45 20/7-7/90 60/7-7/45 20/7-21/45 20/21-7/45 20/7-35/45 20/35-7/45 20/7-49/45 20/49-7/45