4628.57% is the change from 21 to 993
Calculation steps:
[( 993 - 21 ) ÷ 21] x 100 = 4628.57%
Formula
Percentage change = [(993 - 21) / 21] x 100
Subtract the new number by the original number
993 - 21 = 972
972 ÷ 21 = 46.285714285714285
46.285714285714285 x 100 = 4628.57%