-65.63% is the change from 515 to 177
Calculation steps:
[( 177 - 515 ) ÷ 515] x 100 = -65.63%
Formula
Percentage change = [(177 - 515) / 515] x 100
Subtract the new number by the original number
177 - 515 = -338
-338 ÷ 515 = -0.6563106796116505
-0.6563106796116505 x 100 = -65.63%