-33% is the change from 400 to 268
Calculation steps:
[( 268 - 400 ) ÷ 400] x 100 = -33%
Formula
Percentage change = [(268 - 400) / 400] x 100
Subtract the new number by the original number
268 - 400 = -132
-132 ÷ 400 = -0.33
-0.33 x 100 = -33%
Example