-81.94% is the change from 919 to 166
Calculation steps:
[( 166 - 919 ) ÷ 919] x 100 = -81.94%
Formula
Percentage change = [(166 - 919) / 919] x 100
Subtract the new number by the original number
166 - 919 = -753
-753 ÷ 919 = -0.8193688792165397
-0.8193688792165397 x 100 = -81.94%