Add 28/63 and 60/90
28/63 + 60/90 is 10/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
28/63 = 28 × 10/63 × 10 = 280/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
60/90 = 60 × 7/90 × 7 = 420/630 - Add the two like fractions:
280/630 + 420/630 = 280 + 420/630 = 700/630 - 700/630 simplified gives 10/9
- So, 28/63 + 60/90 = 10/9
In mixed form: 11/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/63+60/90 84/63+60/90