-40.17% is the change from 844 to 505
Calculation steps:
[( 505 - 844 ) ÷ 844] x 100 = -40.17%
Formula
Percentage change = [(505 - 844) / 844] x 100
Subtract the new number by the original number
505 - 844 = -339
-339 ÷ 844 = -0.40165876777251186
-0.40165876777251186 x 100 = -40.17%