450.34% is the change from 149 to 820
Calculation steps:
[( 820 - 149 ) ÷ 149] x 100 = 450.34%
Formula
Percentage change = [(820 - 149) / 149] x 100
Subtract the new number by the original number
820 - 149 = 671
671 ÷ 149 = 4.503355704697986
4.503355704697986 x 100 = 450.34%