-91.11% is the change from 135 to 12
Calculation steps:
[( 12 - 135 ) ÷ 135] x 100 = -91.11%
Formula
Percentage change = [(12 - 135) / 135] x 100
Subtract the new number by the original number
12 - 135 = -123
-123 ÷ 135 = -0.9111111111111111
-0.9111111111111111 x 100 = -91.11%