Add 10/21 and 4/30
10/21 + 4/30 is 64/105.
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,
10/21 = 10 × 10/21 × 10 = 100/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
4/30 = 4 × 7/30 × 7 = 28/210 - Add the two like fractions:
100/210 + 28/210 = 100 + 28/210 = 128/210 - 128/210 simplified gives 64/105
- So, 10/21 + 4/30 = 64/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/21+4/30 10/21+8/30 10/42+4/30 10/21+4/60 30/21+4/30 10/21+12/30 10/63+4/30 10/21+4/90 50/21+4/30 10/21+20/30 70/21+4/30 10/21+28/30