Subtract 18/7 from 75/20
1st number: 3 15/20, 2nd number: 2 4/7
75/20 - 18/7 is 33/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
75/20 = 75 × 7/20 × 7 = 525/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
18/7 = 18 × 20/7 × 20 = 360/140 - Subtract the two like fractions:
525/140 - 360/140 = 525 - 360/140 = 165/140 - After reducing the fraction, the answer is 33/28
- In mixed form: 15/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/20-36/7 75/40-18/7 75/20-18/14 75/20-54/7 75/60-18/7 75/20-18/21 75/20-90/7 75/20-18/35 75/20-18/49