Add 18/45 and 4/72
18/45 + 4/72 is 41/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
18/45 = 18 × 8/45 × 8 = 144/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
4/72 = 4 × 5/72 × 5 = 20/360 - Add the two like fractions:
144/360 + 20/360 = 144 + 20/360 = 164/360 - 164/360 simplified gives 41/90
- So, 18/45 + 4/72 = 41/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/45+4/72 18/45+8/72 18/90+4/72 54/45+4/72 18/45+12/72 90/45+4/72 18/45+20/72 18/45+28/72