-83.4% is the change from 934 to 155
Calculation steps:
[( 155 - 934 ) ÷ 934] x 100 = -83.4%
Formula
Percentage change = [(155 - 934) / 934] x 100
Subtract the new number by the original number
155 - 934 = -779
-779 ÷ 934 = -0.8340471092077087
-0.8340471092077087 x 100 = -83.4%