Add 2/21 and 9/90
2/21 + 9/90 is 41/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
2/21 = 2 × 30/21 × 30 = 60/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
9/90 = 9 × 7/90 × 7 = 63/630 - Add the two like fractions:
60/630 + 63/630 = 60 + 63/630 = 123/630 - 123/630 simplified gives 41/210
- So, 2/21 + 9/90 = 41/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21+9/90 2/21+18/90 2/42+9/90 6/21+9/90 2/21+27/90 2/63+9/90 10/21+9/90 2/21+45/90 14/21+9/90 2/21+63/90