-70.6% is the change from 670 to 197
Calculation steps:
[( 197 - 670 ) ÷ 670] x 100 = -70.6%
Formula
Percentage change = [(197 - 670) / 670] x 100
Subtract the new number by the original number
197 - 670 = -473
-473 ÷ 670 = -0.7059701492537314
-0.7059701492537314 x 100 = -70.6%