-29.41% is the change from 17 to 12
Calculation steps:
[( 12 - 17 ) ÷ 17] x 100 = -29.41%
Formula
Percentage change = [(12 - 17) / 17] x 100
Subtract the new number by the original number
12 - 17 = -5
-5 ÷ 17 = -0.29411764705882354
-0.29411764705882354 x 100 = -29.41%