Add 30/70 and 3/90
30/70 + 3/90 is 97/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
30/70 = 30 × 9/70 × 9 = 270/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
3/90 = 3 × 7/90 × 7 = 21/630 - Add the two like fractions:
270/630 + 21/630 = 270 + 21/630 = 291/630 - 291/630 simplified gives 97/210
- So, 30/70 + 3/90 = 97/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70+3/90 30/70+6/90 90/70+3/90 30/70+9/90 30/70+15/90 30/70+21/90