Add 21/5 and 80/30
1st number: 4 1/5, 2nd number: 2 20/30
21/5 + 80/30 is 103/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 5 × 6 = 30,
21/5 = 21 × 6/5 × 6 = 126/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
80/30 = 80 × 1/30 × 1 = 80/30 - Add the two like fractions:
126/30 + 80/30 = 126 + 80/30 = 206/30 - 206/30 simplified gives 103/15
- So, 21/5 + 80/30 = 103/15
In mixed form: 613/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5+80/30 21/10+80/30 21/5+80/60 63/5+80/30 21/15+80/30 21/5+80/90 21/25+80/30 21/35+80/30