-23.47% is the change from 669 to 512
Calculation steps:
[( 512 - 669 ) ÷ 669] x 100 = -23.47%
Formula
Percentage change = [(512 - 669) / 669] x 100
Subtract the new number by the original number
512 - 669 = -157
-157 ÷ 669 = -0.23467862481315396
-0.23467862481315396 x 100 = -23.47%