-26.17% is the change from 512 to 378
Calculation steps:
[( 378 - 512 ) ÷ 512] x 100 = -26.17%
Formula
Percentage change = [(378 - 512) / 512] x 100
Subtract the new number by the original number
378 - 512 = -134
-134 ÷ 512 = -0.26171875
-0.26171875 x 100 = -26.17%