-80.09% is the change from 939 to 187
Calculation steps:
[( 187 - 939 ) ÷ 939] x 100 = -80.09%
Formula
Percentage change = [(187 - 939) / 939] x 100
Subtract the new number by the original number
187 - 939 = -752
-752 ÷ 939 = -0.8008519701810437
-0.8008519701810437 x 100 = -80.09%