Answer:
Burt's salary increased by 9.615384615%.
Ernie's salary increased by 11.20689655%.
Explanation:
The formula for percentage increase is given by:
% increase = [(New Value - Old Value) / Old Value] * 100
Percent increase for Burt's salary:
- We know that 520 is Burt's old salary and 570 is his new salary.
Thus, we can find percent increase for his salary by substituting 520 for the old value and 570 for the new value in the percentage increase formula:
% increase = [(570 - 520) / 520] * 100
% increase = (50 / 520) * 100
% increase = (5/52) * 100
% increase = 125/13% (i.e., 9.615384615%)
Therefore, Burt's salary increased by 9.615384615%.
Percent increase for Ernie's salary:
- We also know that 580 is Ernie's old salary and 645 is his new salary.
Thus, we can find the percent increase for his salary by substituting 580 for the old value and 645 for the new value in the percentage increase formula:
formula:
% increase = [(645 - 580) / 580] * 100
% increase = (65 / 580) * 100
% increase = (13/116) * 100
% increase = 325/29% (i.e., 11.20689655%)
Therefore, Ernie's salary increased by 11.20689655%