The U.S.-based motorcycle manufacturer says that it expects to build 147,000 motorcycles this year, up from 128,000 last year. Find the percent of increase in production.

To find the percent increase in production, we can use the formula:

Percent increase = (new - old) / old * 100%

Where:
new = number of motorcycles built this year = 147,000
old = number of motorcycles built last year = 128,000

Plugging in the values:

Percent increase = (147,000 - 128,000) / 128,000 * 100%
Percent increase = 19,000 / 128,000 * 100%
Percent increase ≈ 14.8%

Therefore, the percent increase in production is approximately 14.8%.