Subtract 75/4 from 28/90
1st number: 28/90, 2nd number: 18 3/4
28/90 - 75/4 is -3319/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 4 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
28/90 = 28 × 2/90 × 2 = 56/180 - Likewise, for the 2nd fraction, since 4 × 45 = 180,
75/4 = 75 × 45/4 × 45 = 3375/180 - Subtract the two like fractions:
56/180 - 3375/180 = 56 - 3375/180 = -3319/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90-75/4 28/90-75/8 84/90-75/4 28/90-75/12 28/90-75/20 28/90-75/28