A unit rate is a ratio between two different units with a denominator of 1. To calculate the unit rate, divide the numerator by the denominator. The resulting decimal number is the unit rate. The unit price is a type of ratio where the numerator is the price and the denominator is the quantity of a good or product.
504/9= 56 504/8= 63 504/7= 72 504/6= 84 ..... we can continue the pattern. However, we know that 50 is the product of 8 and 7, so we can use that number