Add 20/50 and 30/21
1st number: 20/50, 2nd number: 1 9/21
20/50 + 30/21 is 64/35.
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,
20/50 = 20 × 21/50 × 21 = 420/1050 - Likewise, for the 2nd fraction, since 21 × 50 = 1050,
30/21 = 30 × 50/21 × 50 = 1500/1050 - Add the two like fractions:
420/1050 + 1500/1050 = 420 + 1500/1050 = 1920/1050 - 1920/1050 simplified gives 64/35
- So, 20/50 + 30/21 = 64/35
In mixed form: 129/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/50+30/21 20/50+60/21 20/50+30/42 60/50+30/21 20/50+90/21 20/50+30/63