-68.04% is the change from 510 to 163
Calculation steps:
[( 163 - 510 ) ÷ 510] x 100 = -68.04%
Formula
Percentage change = [(163 - 510) / 510] x 100
Subtract the new number by the original number
163 - 510 = -347
-347 ÷ 510 = -0.6803921568627451
-0.6803921568627451 x 100 = -68.04%