-47.01% is the change from 670 to 355
Calculation steps:
[( 355 - 670 ) ÷ 670] x 100 = -47.01%
Formula
Percentage change = [(355 - 670) / 670] x 100
Subtract the new number by the original number
355 - 670 = -315
-315 ÷ 670 = -0.4701492537313433
-0.4701492537313433 x 100 = -47.01%