Add 80/25 and 21/30
1st number: 3 5/25, 2nd number: 21/30
80/25 + 21/30 is 39/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 30 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 25 × 6 = 150,
80/25 = 80 × 6/25 × 6 = 480/150 - Likewise, for the 2nd fraction, since 30 × 5 = 150,
21/30 = 21 × 5/30 × 5 = 105/150 - Add the two like fractions:
480/150 + 105/150 = 480 + 105/150 = 585/150 - 585/150 simplified gives 39/10
- So, 80/25 + 21/30 = 39/10
In mixed form: 39/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/25+42/30 80/50+21/30 80/25+21/60 80/25+63/30 80/75+21/30 80/25+21/90