-29% is the change from 600 to 426
Calculation steps:
[( 426 - 600 ) ÷ 600] x 100 = -29%
Formula
Percentage change = [(426 - 600) / 600] x 100
Subtract the new number by the original number
426 - 600 = -174
-174 ÷ 600 = -0.29
-0.29 x 100 = -29%
Example