-73.63% is the change from 512 to 135
Calculation steps:
[( 135 - 512 ) ÷ 512] x 100 = -73.63%
Formula
Percentage change = [(135 - 512) / 512] x 100
Subtract the new number by the original number
135 - 512 = -377
-377 ÷ 512 = -0.736328125
-0.736328125 x 100 = -73.63%