-87.24% is the change from 392 to 50
Calculation steps:
[( 50 - 392 ) ÷ 392] x 100 = -87.24%
Formula
Percentage change = [(50 - 392) / 392] x 100
Subtract the new number by the original number
50 - 392 = -342
-342 ÷ 392 = -0.8724489795918368
-0.8724489795918368 x 100 = -87.24%