Add 21/5 and 56/80
1st number: 4 1/5, 2nd number: 56/80
21/5 + 56/80 is 49/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 5 × 16 = 80,
21/5 = 21 × 16/5 × 16 = 336/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
56/80 = 56 × 1/80 × 1 = 56/80 - Add the two like fractions:
336/80 + 56/80 = 336 + 56/80 = 392/80 - 392/80 simplified gives 49/10
- So, 21/5 + 56/80 = 49/10
In mixed form: 49/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5+56/80 21/10+56/80 63/5+56/80 21/15+56/80 21/25+56/80 21/35+56/80