Add 2/21 and 25/90
2/21 + 25/90 is 47/126.
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,
25/90 = 25 × 7/90 × 7 = 175/630 - Add the two like fractions:
60/630 + 175/630 = 60 + 175/630 = 235/630 - 235/630 simplified gives 47/126
- So, 2/21 + 25/90 = 47/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21+25/90 2/21+50/90 2/42+25/90 6/21+25/90 2/21+75/90 2/63+25/90 10/21+25/90 14/21+25/90