Add 81/21 and 15/50
1st number: 3 18/21, 2nd number: 15/50
81/21 + 15/50 is 291/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 50 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 21 × 50 = 1050,
81/21 = 81 × 50/21 × 50 = 4050/1050 - Likewise, for the 2nd fraction, since 50 × 21 = 1050,
15/50 = 15 × 21/50 × 21 = 315/1050 - Add the two like fractions:
4050/1050 + 315/1050 = 4050 + 315/1050 = 4365/1050 - 4365/1050 simplified gives 291/70
- So, 81/21 + 15/50 = 291/70
In mixed form: 411/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/21+30/50 81/42+15/50 81/21+45/50 81/63+15/50 81/21+75/50