-50.97% is the change from 771 to 378
Calculation steps:
[( 378 - 771 ) ÷ 771] x 100 = -50.97%
Formula
Percentage change = [(378 - 771) / 771] x 100
Subtract the new number by the original number
378 - 771 = -393
-393 ÷ 771 = -0.5097276264591439
-0.5097276264591439 x 100 = -50.97%