Most Missed from % and Proportion Test

A total of 30 people made cakes for a bake sale.  Each person made 2 cakes.  Mrs. Sanchez found that 15% of all the cakes made were chocolate.  How many chocolate cakes were made for the bake sale? 

• 9
• 4.5
• 25
• 51

The price of a television was reduced from $200 to $180.  By what percentage was the price of the television reduced? 

• 10%
• 15%
• 20%
• 90%

Amanda increased the amount of protein she eats every day from 50g to 58g.  By what percentage did Amanda increase the amount of protein she eats? 

• 8.2%
• 86%
• 13%
• 16%

To make 9 glasses of lemonade, Karla uses 1/2 cup of water, 1/2 cup of lemon juice and 3.5 cups of water.  If Karla wants to make 15 glasses of lemonade, which proportion can she use to determine how many cups of water, w, she will need? 

• 9/3.5 = 15/w
• B
• C
• D

Last week, Joe made $80 working as a cashier for 10 hours and $130 working as a stocker for 13 hours. 
If this week, he works as a cashier for 5 hours and a stocker for 3 hours, how much money will he make?

• $70.00
• $210.00
• $31.00
• $130.00