help with this math question!?

If a serving is 165 calories then the number of calories per piece is 165/4

If there are "x" pieces consumed, then the total number of calories is:

C = (165/4)x (answer B)

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How many pieces of candy are in the bag if the entire bag has 1,485 calories?

We have an expression for the number of calories in one piece (165/4) so divide the total number of calories by this to get the number of candies in the bag:

1485 / (165/4)

1485 * (4/165)

9 * 4

36 pieces in the bag.

conversion factor 

4 candies = 165 calories( 165 calories / 4 candies ) ==>this conversion factor can be multiplied by the number of candies to get the total amount of caloriesand

( 4 candies / 165 calories  ) ==> this conversion factor can be multiplied by the amount of calories to get the total number of candies

part 1:

( 165 calories / 4 candies ) is chosen.

ANSWER: B

c = ( 165/4 )x

part 2:

( 4 candies / 165 calories )  is chosen

C = ( 4/165)x

C = ( 4/165 )( 1485 ) 

C = 36 candies

Answer is B and 36 not that hard