-60.09% is the change from 228 to 91
Calculation steps:
[( 91 - 228 ) ÷ 228] x 100 = -60.09%
Formula
Percentage change = [(91 - 228) / 228] x 100
Subtract the new number by the original number
91 - 228 = -137
-137 ÷ 228 = -0.6008771929824561
-0.6008771929824561 x 100 = -60.09%