I could be wrong but how I would answer is 5/100 and x/102.58 then cross multiply ? Which would be 102.58 x 5 = 512.9 and divided by 100 equals 5.129. Not sure but that’s how I would solve it.
Is that the entire question. If you're looking to find the unit price (how much you are being charged for on unit) you can divide 300 by 19 and you get 15.79, which I rounded to the nearest tenth
A= 54
B= 7
C= 21
D= 86
Your welcome I hope this helps
