-54.95% is the change from 839 to 378
Calculation steps:
[( 378 - 839 ) ÷ 839] x 100 = -54.95%
Formula
Percentage change = [(378 - 839) / 839] x 100
Subtract the new number by the original number
378 - 839 = -461
-461 ÷ 839 = -0.5494636471990465
-0.5494636471990465 x 100 = -54.95%