Add 84/20 and 28/63, Solve 4 4/20 + 28/63 as a fraction

Add 84/20 and 28/63

1^st number: 4 4/20, 2^nd number: 28/63

84/20 + 28/63 is 209/45.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 20 × 63 = 1260,
84/20 = 84 × 63/20 × 63 = 5292/1260
Likewise, for the 2nd fraction, since 63 × 20 = 1260,
28/63 = 28 × 20/63 × 20 = 560/1260
Add the two like fractions:
5292/1260 + 560/1260 = 5292 + 560/1260 = 5852/1260
5852/1260 simplified gives 209/45
So, 84/20 + 28/63 = 209/45
In mixed form: 429/45

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad