-27.57% is the change from 428 to 310
Calculation steps:
[( 310 - 428 ) ÷ 428] x 100 = -27.57%
Formula
Percentage change = [(310 - 428) / 428] x 100
Subtract the new number by the original number
310 - 428 = -118
-118 ÷ 428 = -0.2757009345794392
-0.2757009345794392 x 100 = -27.57%