Add 90/21 and 14/30
1st number: 4 6/21, 2nd number: 14/30
90/21 + 14/30 is 499/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
90/21 = 90 × 10/21 × 10 = 900/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
14/30 = 14 × 7/30 × 7 = 98/210 - Add the two like fractions:
900/210 + 98/210 = 900 + 98/210 = 998/210 - 998/210 simplified gives 499/105
- So, 90/21 + 14/30 = 499/105
In mixed form: 479/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21+28/30 90/42+14/30 90/21+14/60 90/21+42/30 90/63+14/30 90/21+14/90 90/21+70/30 90/21+98/30