Add 28/63 and 12/90
28/63 + 12/90 is 26/45.
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,
12/90 = 12 × 7/90 × 7 = 84/630 - Add the two like fractions:
280/630 + 84/630 = 280 + 84/630 = 364/630 - 364/630 simplified gives 26/45
- So, 28/63 + 12/90 = 26/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/63+12/90 28/63+24/90 84/63+12/90 28/63+36/90 28/63+60/90 28/63+84/90