-70.7% is the change from 512 to 150
Calculation steps:
[( 150 - 512 ) ÷ 512] x 100 = -70.7%
Formula
Percentage change = [(150 - 512) / 512] x 100
Subtract the new number by the original number
150 - 512 = -362
-362 ÷ 512 = -0.70703125
-0.70703125 x 100 = -70.7%