Add 5/21 and 40/30
1st number: 5/21, 2nd number: 1 10/30
5/21 + 40/30 is 11/7.
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,
5/21 = 5 × 10/21 × 10 = 50/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
40/30 = 40 × 7/30 × 7 = 280/210 - Add the two like fractions:
50/210 + 280/210 = 50 + 280/210 = 330/210 - 330/210 simplified gives 11/7
- So, 5/21 + 40/30 = 11/7
In mixed form: 14/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+40/30 5/21+80/30 5/42+40/30 5/21+40/60 15/21+40/30 5/63+40/30 5/21+40/90 25/21+40/30 35/21+40/30