99.07% is the change from 215 to 428
Calculation steps:
[( 428 - 215 ) ÷ 215] x 100 = 99.07%
Formula
Percentage change = [(428 - 215) / 215] x 100
Subtract the new number by the original number
428 - 215 = 213
213 ÷ 215 = 0.9906976744186047
0.9906976744186047 x 100 = 99.07%