-45.37% is the change from 313 to 171
Calculation steps:
[( 171 - 313 ) ÷ 313] x 100 = -45.37%
Formula
Percentage change = [(171 - 313) / 313] x 100
Subtract the new number by the original number
171 - 313 = -142
-142 ÷ 313 = -0.4536741214057508
-0.4536741214057508 x 100 = -45.37%