Subtract 20/45 from 70/36
1st number: 1 34/36, 2nd number: 20/45
70/36 - 20/45 is 3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
70/36 = 70 × 5/36 × 5 = 350/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
20/45 = 20 × 4/45 × 4 = 80/180 - Subtract the two like fractions:
350/180 - 80/180 = 350 - 80/180 = 270/180 - After reducing the fraction, the answer is 3/2
- In mixed form: 11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/36-40/45 70/72-20/45 70/36-20/90 70/36-60/45