-73.24% is the change from 512 to 137
Calculation steps:
[( 137 - 512 ) ÷ 512] x 100 = -73.24%
Formula
Percentage change = [(137 - 512) / 512] x 100
Subtract the new number by the original number
137 - 512 = -375
-375 ÷ 512 = -0.732421875
-0.732421875 x 100 = -73.24%