Subtract 21/18 from 75/15
1st number: 5 0/15, 2nd number: 1 3/18
75/15 - 21/18 is 23/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
75/15 = 75 × 6/15 × 6 = 450/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Subtract the two like fractions:
450/90 - 105/90 = 450 - 105/90 = 345/90 - After reducing the fraction, the answer is 23/6
- In mixed form: 35/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/15-42/18 75/30-21/18 75/15-21/36 75/15-63/18 75/45-21/18 75/15-21/54 75/15-21/90