Answer:
15.8%
Explanation:
You want the percentage of world bike production represented by 13.239 million bikes out of a world production of 84 million bikes.
Percentage
A fraction is converted to a percentage by multiplying it by 100%.
13.239/84 × 100% ≈ 15.8%
Germany contributed about 15.8% of the world's bike production in 2006.