Add 28/90 and 35/70
28/90 + 35/70 is 73/90.
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,
35/70 = 35 × 9/70 × 9 = 315/630 - Add the two like fractions:
196/630 + 315/630 = 196 + 315/630 = 511/630 - 511/630 simplified gives 73/90
- So, 28/90 + 35/70 = 73/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90+35/70 84/90+35/70