Subtract 35/90 from 21/5
1st number: 4 1/5, 2nd number: 35/90
21/5 - 35/90 is 343/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
21/5 = 21 × 18/5 × 18 = 378/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
35/90 = 35 × 1/90 × 1 = 35/90 - Subtract the two like fractions:
378/90 - 35/90 = 378 - 35/90 = 343/90 - In mixed form: 373/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5-35/90 21/5-70/90 21/10-35/90 63/5-35/90 21/15-35/90 21/25-35/90 21/35-35/90