Chapter 5. Calculating Percentage Change
Pre-Test Question:
Math and Graphing Review
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You must read each slide, and complete any questions on the slide, in sequence.
Question
F+hadEMJ0vhPPr3f4U9tHNJ4wf5rvep7RapWmXyFbJ2eHKY4hdDjnDi0ZoZInXgJTohtGRHuaBbfTqNmqnxkDl5I+8iCetgFlMu5TtGZJyMW76bBk+/aET1R5BYKKOfp0uA5/eiwLV+ankfEAUkoEV8HP0SyU+y5jlF00wkXOzGRUBASZKw87Y52FeEYvQO3aWEbODaryfWjGMWw3TXSTDGWR3kdV5XqvNuh1n4LOR6ymOY5d4B+x772IHRotB1onL5ltCO3m2hDV+QVdmW91A==Correct! The price of orange juice rose by 25%.
Sorry, the price of orange juice rose by 25%. To determine the percentage change use the formula for percentage change: (5 – 4)/4 = 1/4 = 0.25 = 25%.
Video
Post-Test Questions:
Question 5.1
tjVbwC/y/z9A3GwIkuVHB13MPIznGKKFQlh4L/U5ZdvnCD+t6t0mIXu2kP4oP2nft9A2wa9AcAjWeSvqaRWayRWEBxWEqNG7vrn6f8ZN+VQW1SaZCqyjaUL+XkJaYU/HDG/eq3djocjfRgJFxv/2XjpOm7iD/ULn2j9Nngwk8U2L4UZ18AhWkUjzRO1baPFd551lf/M+RV3H1+kdHZy6dVtiKDw4DsfgQCtHW077HG7lD6kxLpgsxWKMjOPIOKDW3ZHipQ==Correct! The price of the TV decreased by 20%.
Sorry, the price of the TV decrease by 20%. To determine the percentage change use the formula for percentage change: (1000 – 1250)/1250 = –250/1250 = –0.2 = –20%.
Question 5.2
SZOl3yfCCPKJQApviI67i+G6HUqCjr9sKVAqJrnpoSaHm926uRrbfFP2I4XGGrwoF8Z3UPi4adgeUt61K52CbObHnftHKwXIo2gQiQAILwkpLf0pcMW2mOTbvlYCy4o1c4VTyufw5RTk4o3gWSDGxRlIrByDcin5nNywLpJtw17csy2/VkgMP+F9Gb4=Correct! The price of this TV was decreased $100.
Sorry, the price of this TV was decreased $100. To determine the change in variable use the formula for change in variable: 900 – 1000 = –100.
Question 5.3
W9BDUjjQfCDRrqy6vHciSdO32L7a6f7uG7D3vELFqfwNkmNommI8GWVTqO8YRTv2Og2ib2cUuYCaAPxpX5KY5MS7dh94AWg45/W7S3qplTtpoeAhxdzkM5UfbTl2ge4P41I33qNXIZ761jwzb+Aaf+Zrk/PW/dIGHC3W2nm5BeXzy8K8nFXfY3sE9iChEhBKj81cuo00exTfCvOrSBl/vlA7ln/yqlYq5qY7lnJBKjrYJnbg1///1NyNp6fxNpB3JFeSYmbyBxz1SvqjtgNEGyuX//2+i/oHUxcK3vI4gvCzJlLBulIHGeitb1UBiHwch5VzxQjxElj+rQckBX2uYJoL/2wFeVusuCnUuhnIR/tWHgFdg85fAxRrtTtOp0wUvBglUQTvTi2MXhMYbrGX6gOjUB5bqqbJj65ma+uVmYubiYls7a0z9uq5MzQ=Correct! The guest count increased by 33.3%.
Sorry, the guest count increased by 33.3%. To determine the percentage change use the formula for percentage change: (12 – 16)/12 = 4/12 = 0.333 = 33.3%.
Question 5.4
Fsolp7haI2/hr4h4No0USJ1c6C2Vh1sCLU2UkAfIRSyTJ68bZz9xCmoupeuKxF9P3jfQmcMeAC/9bKgC46A2pMr3fWHmdA8UAUbtPYobgFDuSUHB213ysq63nlC5pQzwE8RrW9rNaOEhw9HXssoB/mhPMN2RLKMvtIPy9viophTOnMGW9vWnIRuFPjO2AJj818g/dQ1OrUvH0Xyd/wx41fuFA0WqH/vckpMaY86c8DL0CbrqrR25zLfkRqiJcwbWW258T+wMs1GwCsoo4ZiVejhLLHhahgt5IQowRsrMBNmdmmCXqhFVrZ9NS5ArTEF45iTTaKLHEpXn86Q+Qp4FBx9lbyQ=Correct! The amount of candy on hand decreased by 30%.
Sorry, the amount of candy on hand decreased by 30%. To determine the percentage change use the formula for percentage change: (500 – 350)/500 = –150/500 = –0.30 = –30%.
Question 5.5
b1wHgSJHqEgbGG7N5ETJDlM049PlgD6STa/5NCCW5QOvoxZoFu6A7TEvXjBr8i7yQLh7eaueAtRZsYg7CQkMMN+vR3JSjxeTDl30OalwL+zdighf0ZczAtkkUAqR3WzX58NJNBzqnh/NO5h0IY30b6CNPJhz09fhjrb57DmACodRz6ngkUIPIRPF48tQJQ6dQ4sfkK4Mm1iFwrnXJKRRMlu/plmxlQSdAk7kOaCDv5kOuX4bv7wRw7WAP0O2eZaHAjYIXQ==Correct! The price of gas rose by 6.08%.
Sorry, the price of gas rose by 6.08%. To determine the percentage change use the formula for percentage change: (3.29 – 3.49)/3.29 = .2/3.29 = 0.0608 = 6.08%.