-1.11% is the change from 180 to 178
Calculation steps:
[( 178 - 180 ) ÷ 180] x 100 = -1.11%
Formula
Percentage change = [(178 - 180) / 180] x 100
Subtract the new number by the original number
178 - 180 = -2
-2 ÷ 180 = -0.011111111111111112
-0.011111111111111112 x 100 = -1.11%