A number increased by 28% gives 320 as a result. Find the number.

A number increased by 28% results in 320. 

Solution: 

Let the number be x.

According to the question:

​$$x \times \frac{128}{100} = 320 \\ \ \\ x = \frac{ 320 \times 100}{128} \\ \ \\ x = 250$$ 

Thus, the number is 250.