Add 5/72 and 20/90
5/72 + 20/90 is 7/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
5/72 = 5 × 5/72 × 5 = 25/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
20/90 = 20 × 4/90 × 4 = 80/360 - Add the two like fractions:
25/360 + 80/360 = 25 + 80/360 = 105/360 - 105/360 simplified gives 7/24
- So, 5/72 + 20/90 = 7/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/72+20/90 5/72+40/90 15/72+20/90 5/72+60/90 25/72+20/90 35/72+20/90