-38.46% is the change from 832 to 512
Calculation steps:
[( 512 - 832 ) ÷ 832] x 100 = -38.46%
Formula
Percentage change = [(512 - 832) / 832] x 100
Subtract the new number by the original number
512 - 832 = -320
-320 ÷ 832 = -0.38461538461538464
-0.38461538461538464 x 100 = -38.46%