-68.96% is the change from 509 to 158
Calculation steps:
[( 158 - 509 ) ÷ 509] x 100 = -68.96%
Formula
Percentage change = [(158 - 509) / 509] x 100
Subtract the new number by the original number
158 - 509 = -351
-351 ÷ 509 = -0.6895874263261297
-0.6895874263261297 x 100 = -68.96%