Add 21/8 and 5/80
1st number: 2 5/8, 2nd number: 5/80
21/8 + 5/80 is 43/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 8 × 10 = 80,
21/8 = 21 × 10/8 × 10 = 210/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
5/80 = 5 × 1/80 × 1 = 5/80 - Add the two like fractions:
210/80 + 5/80 = 210 + 5/80 = 215/80 - 215/80 simplified gives 43/16
- So, 21/8 + 5/80 = 43/16
In mixed form: 211/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8+5/80 21/8+10/80 21/16+5/80 63/8+5/80 21/8+15/80 21/24+5/80 21/8+25/80 21/40+5/80 21/8+35/80 21/56+5/80