I dont understand the whole lesson " sove percent change and percent error problems "

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Step-by-step explanation:

Of which can be considered the “correct” value. The percent difference is the absolute value of the difference over the mean times 100. quantity, T, which is considered the “correct” value. The percent error is the absolute value of the difference divided by the “correct” value times 100.

percent change: shows the change as a percent of the old value ... so divide by the old value and make it a percentage

example: the percentage change from 5 to 7 is: 2/5 = 0.4 = 40%

and percent error: shows the error as a percent of the exact value ... so divide by the exact value and make it a percentage:

example:65/325 = 0.2 = 20%

Hopes this Helps :D

where are the options?

step-by-step explanation:

whatever you can spend with $11.53 or under.

step-by-step explanation:

20 - 8.47 = 11.53. take away the money he used for lunch from the starting amount of 20.