Add 20/36 and 18/45
20/36 + 18/45 is 43/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
20/36 = 20 × 5/36 × 5 = 100/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
18/45 = 18 × 4/45 × 4 = 72/180 - Add the two like fractions:
100/180 + 72/180 = 100 + 72/180 = 172/180 - 172/180 simplified gives 43/45
- So, 20/36 + 18/45 = 43/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/36+18/45 20/36+36/45 20/72+18/45 20/36+18/90 60/36+18/45 20/36+54/45 20/36+90/45