-75.15% is the change from 515 to 128
Calculation steps:
[( 128 - 515 ) ÷ 515] x 100 = -75.15%
Formula
Percentage change = [(128 - 515) / 515] x 100
Subtract the new number by the original number
128 - 515 = -387
-387 ÷ 515 = -0.7514563106796116
-0.7514563106796116 x 100 = -75.15%