-54.58% is the change from 830 to 377
Calculation steps:
[( 377 - 830 ) ÷ 830] x 100 = -54.58%
Formula
Percentage change = [(377 - 830) / 830] x 100
Subtract the new number by the original number
377 - 830 = -453
-453 ÷ 830 = -0.5457831325301205
-0.5457831325301205 x 100 = -54.58%