Add 45/50 and 75/21
1st number: 45/50, 2nd number: 3 12/21
45/50 + 75/21 is 313/70.
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,
75/21 = 75 × 50/21 × 50 = 3750/1050 - Add the two like fractions:
945/1050 + 3750/1050 = 945 + 3750/1050 = 4695/1050 - 4695/1050 simplified gives 313/70
- So, 45/50 + 75/21 = 313/70
In mixed form: 433/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/50+75/21 45/50+75/42 45/50+75/63