Add 28/10 and 90/63, Solve 2 8/10 + 1 27/63 as a fraction

Add 28/10 and 90/63

1^st number: 2 8/10, 2^nd number: 1 27/63

28/10 + 90/63 is 148/35.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 63 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 10 × 63 = 630,
28/10 = 28 × 63/10 × 63 = 1764/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
90/63 = 90 × 10/63 × 10 = 900/630
Add the two like fractions:
1764/630 + 900/630 = 1764 + 900/630 = 2664/630
2664/630 simplified gives 148/35
So, 28/10 + 90/63 = 148/35
In mixed form: 48/35

MathStep (Works offline)

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