Subtract 5/72 from 28/90
28/90 - 5/72 is 29/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
28/90 = 28 × 4/90 × 4 = 112/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
5/72 = 5 × 5/72 × 5 = 25/360 - Subtract the two like fractions:
112/360 - 25/360 = 112 - 25/360 = 87/360 - After reducing the fraction, the answer is 29/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90-5/72 28/90-10/72 84/90-5/72 28/90-15/72 28/90-25/72 28/90-35/72