Subtract 8/35 from 20/45
20/45 - 8/35 is 68/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 35 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
20/45 = 20 × 7/45 × 7 = 140/315 - Likewise, for the 2nd fraction, since 35 × 9 = 315,
8/35 = 8 × 9/35 × 9 = 72/315 - Subtract the two like fractions:
140/315 - 72/315 = 140 - 72/315 = 68/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45-8/35 20/45-16/35 20/90-8/35 20/45-8/70 60/45-8/35 20/45-24/35 20/45-40/35 20/45-56/35