-71.09% is the change from 512 to 148
Calculation steps:
[( 148 - 512 ) ÷ 512] x 100 = -71.09%
Formula
Percentage change = [(148 - 512) / 512] x 100
Subtract the new number by the original number
148 - 512 = -364
-364 ÷ 512 = -0.7109375
-0.7109375 x 100 = -71.09%