1438.1% is the change from 21 to 323
Calculation steps:
[( 323 - 21 ) ÷ 21] x 100 = 1438.1%
Formula
Percentage change = [(323 - 21) / 21] x 100
Subtract the new number by the original number
323 - 21 = 302
302 ÷ 21 = 14.380952380952381
14.380952380952381 x 100 = 1438.1%