-6.85% is the change from 657 to 612
Calculation steps:
[( 612 - 657 ) ÷ 657] x 100 = -6.85%
Formula
Percentage change = [(612 - 657) / 657] x 100
Subtract the new number by the original number
612 - 657 = -45
-45 ÷ 657 = -0.0684931506849315
-0.0684931506849315 x 100 = -6.85%