52÷8=6.5
This is because 8 can go into 52, six times then your decimal pops up.
Ok so basically, the number of student tickets is 3x, where x=the number of adult tickets sold. And we know that s(for student tickets)+x=480 total tickets sold. So if we replace s with 3x we have 3x+x=480, or 4x=480. We divide by 4 and get x=120, which is the amount of adult tickets sold.
I) 80% x 5640 = Rs. 4512
ii) 4512 divide by 50 = Rs. 90.24