-82.4% is the change from 375 to 66
Calculation steps:
[( 66 - 375 ) ÷ 375] x 100 = -82.4%
Formula
Percentage change = [(66 - 375) / 375] x 100
Subtract the new number by the original number
66 - 375 = -309
-309 ÷ 375 = -0.824
-0.824 x 100 = -82.4%
Example