Add 7/18 and 7/20
7/18 + 7/20 is 133/180.
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,
7/18 = 7 × 10/18 × 10 = 70/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
7/20 = 7 × 9/20 × 9 = 63/180 - Add the two like fractions:
70/180 + 63/180 = 70 + 63/180 = 133/180 - So, 7/18 + 7/20 = 133/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/18+7/20 7/18+14/20 7/36+7/20 7/18+7/40 21/18+7/20 7/18+21/20 7/54+7/20 7/18+7/60 35/18+7/20 7/18+35/20 7/90+7/20 49/18+7/20 7/18+49/20