84.21% is the change from 228 to 420
Calculation steps:
[( 420 - 228 ) ÷ 228] x 100 = 84.21%
Formula
Percentage change = [(420 - 228) / 228] x 100
Subtract the new number by the original number
420 - 228 = 192
192 ÷ 228 = 0.8421052631578947
0.8421052631578947 x 100 = 84.21%