Subtract 21/90 from 35/18
1st number: 1 17/18, 2nd number: 21/90
35/18 - 21/90 is 77/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
35/18 = 35 × 5/18 × 5 = 175/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Subtract the two like fractions:
175/90 - 21/90 = 175 - 21/90 = 154/90 - After reducing the fraction, the answer is 77/45
- In mixed form: 132/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/18-21/90 35/18-42/90 35/36-21/90 35/18-63/90 35/54-21/90 35/90-21/90