Respuesta :
Percentage decrease is the amount by which a given number is decreased expressed as a percentage.
- The percentage by which the number was decreased = 19%
Reasons:
The percentage by which the number was decreased = 10%
The number is decreased by 10%
Let x represent the number, we have;
New remainder after first decrease = x - 10% × x = x - 0.1·x = 0.9·x
Decreasing the new number by 10% gives;
Second new number = 0.9·x - 0.09·x = 0.81·x
The percentage by which the number is decreased = x - 0.81·x = 0.19·x
The percentage by which the number is decreased = 19%
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