-75.24% is the change from 517 to 128
Calculation steps:
[( 128 - 517 ) ÷ 517] x 100 = -75.24%
Formula
Percentage change = [(128 - 517) / 517] x 100
Subtract the new number by the original number
128 - 517 = -389
-389 ÷ 517 = -0.7524177949709865
-0.7524177949709865 x 100 = -75.24%