-71.19% is the change from 670 to 193
Calculation steps:
[( 193 - 670 ) ÷ 670] x 100 = -71.19%
Formula
Percentage change = [(193 - 670) / 670] x 100
Subtract the new number by the original number
193 - 670 = -477
-477 ÷ 670 = -0.7119402985074627
-0.7119402985074627 x 100 = -71.19%