Subtract 75/20 from 30/28
1st number: 1 2/28, 2nd number: 3 15/20
30/28 - 75/20 is -75/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
30/28 = 30 × 5/28 × 5 = 150/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
75/20 = 75 × 7/20 × 7 = 525/140 - Subtract the two like fractions:
150/140 - 525/140 = 150 - 525/140 = -375/140 - After reducing the fraction, the answer is -75/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/28-75/20 30/56-75/20 30/28-75/40 90/28-75/20 30/84-75/20 30/28-75/60