-30.61% is the change from 245 to 170
Calculation steps:
[( 170 - 245 ) ÷ 245] x 100 = -30.61%
Formula
Percentage change = [(170 - 245) / 245] x 100
Subtract the new number by the original number
170 - 245 = -75
-75 ÷ 245 = -0.30612244897959184
-0.30612244897959184 x 100 = -30.61%