Subtract 7/45 from 20/35
20/35 - 7/45 is 131/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 35 × 9 = 315,
20/35 = 20 × 9/35 × 9 = 180/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
7/45 = 7 × 7/45 × 7 = 49/315 - Subtract the two like fractions:
180/315 - 49/315 = 180 - 49/315 = 131/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/35-7/45 20/35-14/45 20/70-7/45 20/35-7/90 60/35-7/45 20/35-21/45 20/35-35/45 20/35-49/45