-32.24% is the change from 670 to 454
Calculation steps:
[( 454 - 670 ) ÷ 670] x 100 = -32.24%
Formula
Percentage change = [(454 - 670) / 670] x 100
Subtract the new number by the original number
454 - 670 = -216
-216 ÷ 670 = -0.32238805970149254
-0.32238805970149254 x 100 = -32.24%