4490.48% is the change from 21 to 964
Calculation steps:
[( 964 - 21 ) ÷ 21] x 100 = 4490.48%
Formula
Percentage change = [(964 - 21) / 21] x 100
Subtract the new number by the original number
964 - 21 = 943
943 ÷ 21 = 44.904761904761905
44.904761904761905 x 100 = 4490.48%