2852.38% is the change from 21 to 620
Calculation steps:
[( 620 - 21 ) ÷ 21] x 100 = 2852.38%
Formula
Percentage change = [(620 - 21) / 21] x 100
Subtract the new number by the original number
620 - 21 = 599
599 ÷ 21 = 28.523809523809526
28.523809523809526 x 100 = 2852.38%