Subtract 20/36 from 90/5
1st number: 18 0/5, 2nd number: 20/36
90/5 - 20/36 is 157/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 5 × 36 = 180,
90/5 = 90 × 36/5 × 36 = 3240/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
20/36 = 20 × 5/36 × 5 = 100/180 - Subtract the two like fractions:
3240/180 - 100/180 = 3240 - 100/180 = 3140/180 - After reducing the fraction, the answer is 157/9
- In mixed form: 174/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/5-40/36 90/10-20/36 90/5-20/72 90/5-60/36 90/15-20/36 90/25-20/36 90/35-20/36