Add 45/50 and 15/21
45/50 + 15/21 is 113/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 21 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 50 × 21 = 1050,
45/50 = 45 × 21/50 × 21 = 945/1050 - Likewise, for the 2nd fraction, since 21 × 50 = 1050,
15/21 = 15 × 50/21 × 50 = 750/1050 - Add the two like fractions:
945/1050 + 750/1050 = 945 + 750/1050 = 1695/1050 - 1695/1050 simplified gives 113/70
- So, 45/50 + 15/21 = 113/70
In mixed form: 143/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/50+15/21 45/50+30/21 45/50+15/42 45/50+45/21 45/50+15/63 45/50+75/21