1028.57% is the change from 21 to 237
Calculation steps:
[( 237 - 21 ) ÷ 21] x 100 = 1028.57%
Formula
Percentage change = [(237 - 21) / 21] x 100
Subtract the new number by the original number
237 - 21 = 216
216 ÷ 21 = 10.285714285714286
10.285714285714286 x 100 = 1028.57%