Subtract 70/45 from 90/18
1st number: 5 0/18, 2nd number: 1 25/45
90/18 - 70/45 is 31/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
90/18 = 90 × 5/18 × 5 = 450/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
70/45 = 70 × 2/45 × 2 = 140/90 - Subtract the two like fractions:
450/90 - 140/90 = 450 - 140/90 = 310/90 - After reducing the fraction, the answer is 31/9
- In mixed form: 34/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/36-70/45 90/18-70/90 90/54-70/45