Do you know the answer? LA = GY - D

G = LA/Y + D/Y

Isolate the variable by dividing each side by factors that don't contain the variable.

Hoped this helped!

54 customers paid with cash
42 paid with debit card
153 paid with credit card

Add them up to find the total amount of people:

54 + 42 + 153 = 249

Now write 54(the number of customers who paid with cash) as a fraction over the total, 249.

54/249

So the probability that customers will pay cash is 54/249 or 18/83