-68.63% is the change from 510 to 160
Calculation steps:
[( 160 - 510 ) ÷ 510] x 100 = -68.63%
Formula
Percentage change = [(160 - 510) / 510] x 100
Subtract the new number by the original number
160 - 510 = -350
-350 ÷ 510 = -0.6862745098039216
-0.6862745098039216 x 100 = -68.63%