-30.9% is the change from 657 to 454
Calculation steps:
[( 454 - 657 ) ÷ 657] x 100 = -30.9%
Formula
Percentage change = [(454 - 657) / 657] x 100
Subtract the new number by the original number
454 - 657 = -203
-203 ÷ 657 = -0.3089802130898021
-0.3089802130898021 x 100 = -30.9%