Add 18/21 and 45/10
1st number: 18/21, 2nd number: 4 5/10
18/21 + 45/10 is 75/14.
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,
45/10 = 45 × 21/10 × 21 = 945/210 - Add the two like fractions:
180/210 + 945/210 = 180 + 945/210 = 1125/210 - 1125/210 simplified gives 75/14
- So, 18/21 + 45/10 = 75/14
In mixed form: 55/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21+45/10 18/21+90/10 18/42+45/10 18/21+45/20 54/21+45/10 18/63+45/10 18/21+45/30 90/21+45/10 18/21+45/50 18/21+45/70