-62.91% is the change from 515 to 191
Calculation steps:
[( 191 - 515 ) ÷ 515] x 100 = -62.91%
Formula
Percentage change = [(191 - 515) / 515] x 100
Subtract the new number by the original number
191 - 515 = -324
-324 ÷ 515 = -0.629126213592233
-0.629126213592233 x 100 = -62.91%