The average would be each number of cones sold per day added, and divided by the number of days (3). So this can be translated into the equation (67 + 59 + x)/3 = 60/1. Simplified, that is 67 + 59 + x = 180, then 126 + x = 180, then x = 54.
You can check by adding 67 + 59 + 54, which is 180, and divide by 3 days which is 60. So 54 cones were sold on Sunday.
0.71 is read "seventy-one hundredths".
So, you put 71 over 100.
71 is prime, so no simplification can be done.
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2,500 subtracted by 372 equals 2148. 2148 dollars is how much savings he has left.
