-67.91% is the change from 511 to 164
Calculation steps:
[( 164 - 511 ) ÷ 511] x 100 = -67.91%
Formula
Percentage change = [(164 - 511) / 511] x 100
Subtract the new number by the original number
164 - 511 = -347
-347 ÷ 511 = -0.6790606653620352
-0.6790606653620352 x 100 = -67.91%