-29.3% is the change from 908 to 642
Calculation steps:
[( 642 - 908 ) ÷ 908] x 100 = -29.3%
Formula
Percentage change = [(642 - 908) / 908] x 100
Subtract the new number by the original number
642 - 908 = -266
-266 ÷ 908 = -0.29295154185022027
-0.29295154185022027 x 100 = -29.3%