Add 8/20 and 7/9
8/20 + 7/9 is 53/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
8/20 = 8 × 9/20 × 9 = 72/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
7/9 = 7 × 20/9 × 20 = 140/180 - Add the two like fractions:
72/180 + 140/180 = 72 + 140/180 = 212/180 - 212/180 simplified gives 53/45
- So, 8/20 + 7/9 = 53/45
In mixed form: 18/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/20+7/9 8/20+14/9 8/40+7/9 8/20+7/18 24/20+7/9 8/20+21/9 8/60+7/9 8/20+7/27 40/20+7/9 8/20+35/9 8/20+7/45 56/20+7/9 8/20+49/9 8/20+7/63