-53.42% is the change from 657 to 306
Calculation steps:
[( 306 - 657 ) ÷ 657] x 100 = -53.42%
Formula
Percentage change = [(306 - 657) / 657] x 100
Subtract the new number by the original number
306 - 657 = -351
-351 ÷ 657 = -0.5342465753424658
-0.5342465753424658 x 100 = -53.42%