Add 18/72 and 5/90
18/72 + 5/90 is 11/36.
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,
18/72 = 18 × 5/72 × 5 = 90/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
5/90 = 5 × 4/90 × 4 = 20/360 - Add the two like fractions:
90/360 + 20/360 = 90 + 20/360 = 110/360 - 110/360 simplified gives 11/36
- So, 18/72 + 5/90 = 11/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/72+5/90 18/72+10/90 54/72+5/90 18/72+15/90 90/72+5/90 18/72+25/90 18/72+35/90