Add 20/6 and 21/45
1st number: 3 2/6, 2nd number: 21/45
20/6 + 21/45 is 19/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 6 × 15 = 90,
20/6 = 20 × 15/6 × 15 = 300/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Add the two like fractions:
300/90 + 42/90 = 300 + 42/90 = 342/90 - 342/90 simplified gives 19/5
- So, 20/6 + 21/45 = 19/5
In mixed form: 34/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/6+21/45 20/6+42/45 20/12+21/45 20/6+21/90 60/6+21/45 20/6+63/45 20/18+21/45 20/30+21/45 20/42+21/45