-34.62% is the change from 260 to 170
Calculation steps:
[( 170 - 260 ) ÷ 260] x 100 = -34.62%
Formula
Percentage change = [(170 - 260) / 260] x 100
Subtract the new number by the original number
170 - 260 = -90
-90 ÷ 260 = -0.34615384615384615
-0.34615384615384615 x 100 = -34.62%