-75.37% is the change from 670 to 165
Calculation steps:
[( 165 - 670 ) ÷ 670] x 100 = -75.37%
Formula
Percentage change = [(165 - 670) / 670] x 100
Subtract the new number by the original number
165 - 670 = -505
-505 ÷ 670 = -0.753731343283582
-0.753731343283582 x 100 = -75.37%