Subtract 14/30 from 21/18
1st number: 1 3/18, 2nd number: 14/30
21/18 - 14/30 is 7/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
14/30 = 14 × 3/30 × 3 = 42/90 - Subtract the two like fractions:
105/90 - 42/90 = 105 - 42/90 = 63/90 - After reducing the fraction, the answer is 7/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18-14/30 21/18-28/30 21/36-14/30 21/18-14/60 63/18-14/30 21/18-42/30 21/54-14/30 21/18-14/90 21/18-70/30 21/90-14/30 21/18-98/30