-25.73% is the change from 307 to 228
Calculation steps:
[( 228 - 307 ) ÷ 307] x 100 = -25.73%
Formula
Percentage change = [(228 - 307) / 307] x 100
Subtract the new number by the original number
228 - 307 = -79
-79 ÷ 307 = -0.25732899022801303
-0.25732899022801303 x 100 = -25.73%