Subtract 20/90 from 56/45
1st number: 1 11/45, 2nd number: 20/90
56/45 - 20/90 is 46/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
56/45 = 56 × 2/45 × 2 = 112/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Subtract the two like fractions:
112/90 - 20/90 = 112 - 20/90 = 92/90 - After reducing the fraction, the answer is 46/45
- In mixed form: 11/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/45-40/90 56/90-20/90 56/45-60/90