Add 25/90 and 2/21
25/90 + 2/21 is 47/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
25/90 = 25 × 7/90 × 7 = 175/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
2/21 = 2 × 30/21 × 30 = 60/630 - Add the two like fractions:
175/630 + 60/630 = 175 + 60/630 = 235/630 - 235/630 simplified gives 47/126
- So, 25/90 + 2/21 = 47/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/90+2/21 25/90+4/21 25/90+2/42 75/90+2/21 25/90+6/21 25/90+2/63 25/90+10/21 25/90+14/21