Answer:
65%
Explanation:
To find the percentage, divide the smaller number by the total number. The total amount he spent was $80, so this is the "total number." So divide 52 by 80.
52/80 = 0.65
To convert the decimal 0.65 into a percentage, move the decimal point two places to the right.... Then just add the percentage sign:
52/80 = 0.65 = 65%
Hope this helps :D