Add 3/90 and 28/70
3/90 + 28/70 is 13/30.
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,
3/90 = 3 × 7/90 × 7 = 21/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
28/70 = 28 × 9/70 × 9 = 252/630 - Add the two like fractions:
21/630 + 252/630 = 21 + 252/630 = 273/630 - 273/630 simplified gives 13/30
- So, 3/90 + 28/70 = 13/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/90+28/70 3/90+56/70 9/90+28/70 3/90+84/70 15/90+28/70 21/90+28/70