Question

Tammy predicted that she would sell 300 bottles of water. she actually sold 350 bottles. what is the percent error in the estimate of the number of bottles sold? round the answer to the nearest tenth. –15.4% –14.3% 14.3% 15.4%

Answer 1

She predicted 300, and sold 50 more. So the answet is -50/350, which is -1/7 (-14.2857%), which rounds up to -14.3%

Answer 2

The percentage error is 14.3% .

Explanation:

Formula

`Percentage\ error = (Change\ in\ value* 100)/(Exact\ value)`

Where

Change in value = |Approx value - Exact value|

As given

Tammy predicted that she would sell 300 bottles of water.

she actually sold 350 bottles.

Exact value = 350

Approx value = 300

Put values in the formula

Change in value = |300 - 350|

Change in value = |-50|

Change in value = 50

Put all the values in the percentage error formula

`Percentage\ error = (50* 100)/(350)`

`Percentage\ error = (5000)/(350)`

Percentage error = 14.3%

Therefore the percentage error is 14.3% .