I can't understand the problem well

There must be at least one natural number between A = 0.01*P*N and B = 0.01*Q*N. You have to find minimal possible N.
A = 0.13*15 = 1.95
B = 0.141*15 = 2.115
There is number 2 between A and B. But there is no natural numbers between A and B for all N<15.

Thank you.now,I know the meaning.