-50.91% is the change from 770 to 378
Calculation steps:
[( 378 - 770 ) ÷ 770] x 100 = -50.91%
Formula
Percentage change = [(378 - 770) / 770] x 100
Subtract the new number by the original number
378 - 770 = -392
-392 ÷ 770 = -0.509090909090909
-0.509090909090909 x 100 = -50.91%