Add 20/45 and 42/28
1st number: 20/45, 2nd number: 1 14/28
20/45 + 42/28 is 35/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 28 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 45 × 28 = 1260,
20/45 = 20 × 28/45 × 28 = 560/1260 - Likewise, for the 2nd fraction, since 28 × 45 = 1260,
42/28 = 42 × 45/28 × 45 = 1890/1260 - Add the two like fractions:
560/1260 + 1890/1260 = 560 + 1890/1260 = 2450/1260 - 2450/1260 simplified gives 35/18
- So, 20/45 + 42/28 = 35/18
In mixed form: 117/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45+42/28 20/45+84/28 20/90+42/28 20/45+42/56 60/45+42/28 20/45+42/84