-31.79% is the change from 670 to 457
Calculation steps:
[( 457 - 670 ) ÷ 670] x 100 = -31.79%
Formula
Percentage change = [(457 - 670) / 670] x 100
Subtract the new number by the original number
457 - 670 = -213
-213 ÷ 670 = -0.31791044776119404
-0.31791044776119404 x 100 = -31.79%