-65.38% is the change from 260 to 90
Calculation steps:
[( 90 - 260 ) ÷ 260] x 100 = -65.38%
Formula
Percentage change = [(90 - 260) / 260] x 100
Subtract the new number by the original number
90 - 260 = -170
-170 ÷ 260 = -0.6538461538461539
-0.6538461538461539 x 100 = -65.38%