-69.13% is the change from 515 to 159
Calculation steps:
[( 159 - 515 ) ÷ 515] x 100 = -69.13%
Formula
Percentage change = [(159 - 515) / 515] x 100
Subtract the new number by the original number
159 - 515 = -356
-356 ÷ 515 = -0.6912621359223301
-0.6912621359223301 x 100 = -69.13%