-71.64% is the change from 670 to 190
Calculation steps:
[( 190 - 670 ) ÷ 670] x 100 = -71.64%
Formula
Percentage change = [(190 - 670) / 670] x 100
Subtract the new number by the original number
190 - 670 = -480
-480 ÷ 670 = -0.7164179104477612
-0.7164179104477612 x 100 = -71.64%