4371.43% is the change from 21 to 939
Calculation steps:
[( 939 - 21 ) ÷ 21] x 100 = 4371.43%
Formula
Percentage change = [(939 - 21) / 21] x 100
Subtract the new number by the original number
939 - 21 = 918
918 ÷ 21 = 43.714285714285715
43.714285714285715 x 100 = 4371.43%