1123.81% is the change from 21 to 257
Calculation steps:
[( 257 - 21 ) ÷ 21] x 100 = 1123.81%
Formula
Percentage change = [(257 - 21) / 21] x 100
Subtract the new number by the original number
257 - 21 = 236
236 ÷ 21 = 11.238095238095237
11.238095238095237 x 100 = 1123.81%