Add 20/45 and 84/56
1st number: 20/45, 2nd number: 1 28/56
20/45 + 84/56 is 35/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 45 × 56 = 2520,
20/45 = 20 × 56/45 × 56 = 1120/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
84/56 = 84 × 45/56 × 45 = 3780/2520 - Add the two like fractions:
1120/2520 + 3780/2520 = 1120 + 3780/2520 = 4900/2520 - 4900/2520 simplified gives 35/18
- So, 20/45 + 84/56 = 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+84/56 20/90+84/56 60/45+84/56