Subtract 20/30 from 75/18
1st number: 4 3/18, 2nd number: 20/30
75/18 - 20/30 is 7/2.
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,
75/18 = 75 × 5/18 × 5 = 375/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
20/30 = 20 × 3/30 × 3 = 60/90 - Subtract the two like fractions:
375/90 - 60/90 = 375 - 60/90 = 315/90 - After reducing the fraction, the answer is 7/2
- In mixed form: 31/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/18-40/30 75/36-20/30 75/18-20/60 75/18-60/30 75/54-20/30 75/18-20/90 75/90-20/30