Add 18/21 and 25/10
1st number: 18/21, 2nd number: 2 5/10
18/21 + 25/10 is 47/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
18/21 = 18 × 10/21 × 10 = 180/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
25/10 = 25 × 21/10 × 21 = 525/210 - Add the two like fractions:
180/210 + 525/210 = 180 + 525/210 = 705/210 - 705/210 simplified gives 47/14
- So, 18/21 + 25/10 = 47/14
In mixed form: 35/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21+25/10 18/21+50/10 18/42+25/10 18/21+25/20 54/21+25/10 18/21+75/10 18/63+25/10 18/21+25/30 90/21+25/10 18/21+25/50 18/21+25/70