Add 20/18 and 63/45
1st number: 1 2/18, 2nd number: 1 18/45
20/18 + 63/45 is 113/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
20/18 = 20 × 5/18 × 5 = 100/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
63/45 = 63 × 2/45 × 2 = 126/90 - Add the two like fractions:
100/90 + 126/90 = 100 + 126/90 = 226/90 - 226/90 simplified gives 113/45
- So, 20/18 + 63/45 = 113/45
In mixed form: 223/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18+63/45 20/36+63/45 20/18+63/90 60/18+63/45 20/54+63/45 20/90+63/45