Subtract 18/20 from 75/28
1st number: 2 19/28, 2nd number: 18/20
75/28 - 18/20 is 249/140.
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,
75/28 = 75 × 5/28 × 5 = 375/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
18/20 = 18 × 7/20 × 7 = 126/140 - Subtract the two like fractions:
375/140 - 126/140 = 375 - 126/140 = 249/140 - In mixed form: 1109/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/28-36/20 75/56-18/20 75/28-18/40 75/28-54/20 75/84-18/20 75/28-18/60 75/28-90/20