Subtract 20/45 from 8/5
1st number: 1 3/5, 2nd number: 20/45
8/5 - 20/45 is 52/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,
8/5 = 8 × 9/5 × 9 = 72/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
20/45 = 20 × 1/45 × 1 = 20/45 - Subtract the two like fractions:
72/45 - 20/45 = 72 - 20/45 = 52/45 - In mixed form: 17/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/5-20/45 8/5-40/45 8/10-20/45 8/5-20/90 24/5-20/45 8/5-60/45 8/15-20/45 40/5-20/45 8/25-20/45 56/5-20/45 8/35-20/45