1142.86% is the change from 21 to 261
Calculation steps:
[( 261 - 21 ) ÷ 21] x 100 = 1142.86%
Formula
Percentage change = [(261 - 21) / 21] x 100
Subtract the new number by the original number
261 - 21 = 240
240 ÷ 21 = 11.428571428571429
11.428571428571429 x 100 = 1142.86%