-31.14% is the change from 228 to 157
Calculation steps:
[( 157 - 228 ) ÷ 228] x 100 = -31.14%
Formula
Percentage change = [(157 - 228) / 228] x 100
Subtract the new number by the original number
157 - 228 = -71
-71 ÷ 228 = -0.31140350877192985
-0.31140350877192985 x 100 = -31.14%