-68.43% is the change from 510 to 161
Calculation steps:
[( 161 - 510 ) ÷ 510] x 100 = -68.43%
Formula
Percentage change = [(161 - 510) / 510] x 100
Subtract the new number by the original number
161 - 510 = -349
-349 ÷ 510 = -0.6843137254901961
-0.6843137254901961 x 100 = -68.43%