Add 10/21 and 25/70
10/21 + 25/70 is 5/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 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 70 × 3 = 210,
25/70 = 25 × 3/70 × 3 = 75/210 - Add the two like fractions:
100/210 + 75/210 = 100 + 75/210 = 175/210 - 175/210 simplified gives 5/6
- So, 10/21 + 25/70 = 5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/21+25/70 10/21+50/70 10/42+25/70 30/21+25/70 10/21+75/70 10/63+25/70 50/21+25/70 70/21+25/70