Add 2/21 and 2/90
2/21 + 2/90 is 37/315.
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,
2/90 = 2 × 7/90 × 7 = 14/630 - Add the two like fractions:
60/630 + 14/630 = 60 + 14/630 = 74/630 - 74/630 simplified gives 37/315
- So, 2/21 + 2/90 = 37/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21+2/90 2/21+4/90 2/42+2/90 6/21+2/90 2/21+6/90 2/63+2/90 10/21+2/90 2/21+10/90 14/21+2/90 2/21+14/90