Question

Last year, there were 380 students at Middle school. This year, the student population will increase by 5%. What will be the school's increased student population?

Answer 1

399

Explanation:

You can add 5% to 380, i.e., `380+0.05*380 = 380+19 = 399`.
Or you can do `380*(1+0.05)=380*1.05 = 399`.