674.24% is the change from 66 to 511
Calculation steps:
[( 511 - 66 ) ÷ 66] x 100 = 674.24%
Formula
Percentage change = [(511 - 66) / 66] x 100
Subtract the new number by the original number
511 - 66 = 445
445 ÷ 66 = 6.742424242424242
6.742424242424242 x 100 = 674.24%