Add 28/90 and 9/70
28/90 + 9/70 is 277/630.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
28/90 = 28 × 7/90 × 7 = 196/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
9/70 = 9 × 9/70 × 9 = 81/630 - Add the two like fractions:
196/630 + 81/630 = 196 + 81/630 = 277/630 - So, 28/90 + 9/70 = 277/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90+9/70 28/90+18/70 84/90+9/70 28/90+27/70 28/90+45/70 28/90+63/70