8 days because 4/5 = 8/10 and he is using 1/10 a day.
Just sketch two lines crossing each other like a street intersection.
I don't know the answer I'm just answering some thing so that Brinley will let me ask a question. Hope this helps LOL
Answer:
38%
Step-by-step explanation:
Original price = $ 80
Price after reduction = $ 49.60
Reduction = 80 - 49.60 = $30.40
Percentage of decrease = 

= 38%
Answer: You would have 50 quarters and 20 dimes
Step-by-step explanation: 50-30=20 so, 20+50=70