-90.38% is the change from 156 to 15
Calculation steps:
[( 15 - 156 ) ÷ 156] x 100 = -90.38%
Formula
Percentage change = [(15 - 156) / 156] x 100
Subtract the new number by the original number
15 - 156 = -141
-141 ÷ 156 = -0.9038461538461539
-0.9038461538461539 x 100 = -90.38%