-34.03% is the change from 670 to 442
Calculation steps:
[( 442 - 670 ) ÷ 670] x 100 = -34.03%
Formula
Percentage change = [(442 - 670) / 670] x 100
Subtract the new number by the original number
442 - 670 = -228
-228 ÷ 670 = -0.3402985074626866
-0.3402985074626866 x 100 = -34.03%