Add 20/18 and 72/20
1st number: 1 2/18, 2nd number: 3 12/20
20/18 + 72/20 is 212/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
20/18 = 20 × 10/18 × 10 = 200/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
72/20 = 72 × 9/20 × 9 = 648/180 - Add the two like fractions:
200/180 + 648/180 = 200 + 648/180 = 848/180 - 848/180 simplified gives 212/45
- So, 20/18 + 72/20 = 212/45
In mixed form: 432/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18+72/20 20/36+72/20 20/18+72/40 60/18+72/20 20/54+72/20 20/18+72/60 20/90+72/20