-70.9% is the change from 512 to 149
Calculation steps:
[( 149 - 512 ) ÷ 512] x 100 = -70.9%
Formula
Percentage change = [(149 - 512) / 512] x 100
Subtract the new number by the original number
149 - 512 = -363
-363 ÷ 512 = -0.708984375
-0.708984375 x 100 = -70.9%