Add 20/45 and 16/18
20/45 + 16/18 is 4/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
20/45 = 20 × 2/45 × 2 = 40/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
16/18 = 16 × 5/18 × 5 = 80/90 - Add the two like fractions:
40/90 + 80/90 = 40 + 80/90 = 120/90 - 120/90 simplified gives 4/3
- So, 20/45 + 16/18 = 4/3
In mixed form: 11/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45+16/18 20/45+32/18 20/90+16/18 20/45+16/36 60/45+16/18 20/45+48/18 20/45+16/54 20/45+80/18 20/45+16/90