X%y?

Question

How can I solve thus and where to use IT?

Answer 1

x%y or
num1 % num2

% operator is used to get the remainder when we divide num1 by num2

for example
5 % 2 will return 1 but
5 / 2 will return 2.5 ( consider numbers to be float type )

Answer 2

X/Y=Z+(X%Y)

Z: Integer

Answer 3

Gets you remainder of x/y
Use it to check something is within some range