In order to solve the average amount, you have to add the total amount of money spent and divide it by the total number of times you spent money on food. The total sum of money spent was $63. If you divide that by how many times you ate (6 times) you'll get the dividend/answer of 10.5.
27 is 54% of 50! You can set up fractions (proportions) as 27/50 = blank/100! Well how do you get to 50 to 100? You multiply by 2! And whatever you do to the bottom you must do to the top! So 27 times 2 is 54!
