Add 14/21 and 25/90
14/21 + 25/90 is 17/18.
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,
14/21 = 14 × 30/21 × 30 = 420/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
25/90 = 25 × 7/90 × 7 = 175/630 - Add the two like fractions:
420/630 + 175/630 = 420 + 175/630 = 595/630 - 595/630 simplified gives 17/18
- So, 14/21 + 25/90 = 17/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/21+25/90 14/21+50/90 14/42+25/90 42/21+25/90 14/21+75/90 14/63+25/90 70/21+25/90 98/21+25/90