-91.97% is the change from 623 to 50
Calculation steps:
[( 50 - 623 ) ÷ 623] x 100 = -91.97%
Formula
Percentage change = [(50 - 623) / 623] x 100
Subtract the new number by the original number
50 - 623 = -573
-573 ÷ 623 = -0.9197431781701445
-0.9197431781701445 x 100 = -91.97%