-70.45% is the change from 670 to 198
Calculation steps:
[( 198 - 670 ) ÷ 670] x 100 = -70.45%
Formula
Percentage change = [(198 - 670) / 670] x 100
Subtract the new number by the original number
198 - 670 = -472
-472 ÷ 670 = -0.7044776119402985
-0.7044776119402985 x 100 = -70.45%