Subtract 21/90 from 14/5
1st number: 2 4/5, 2nd number: 21/90
14/5 - 21/90 is 77/30.
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,
14/5 = 14 × 18/5 × 18 = 252/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Subtract the two like fractions:
252/90 - 21/90 = 252 - 21/90 = 231/90 - After reducing the fraction, the answer is 77/30
- In mixed form: 217/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/5-21/90 14/5-42/90 14/10-21/90 42/5-21/90 14/5-63/90 14/15-21/90 70/5-21/90 14/25-21/90 98/5-21/90 14/35-21/90