-27.97% is the change from 236 to 170
Calculation steps:
[( 170 - 236 ) ÷ 236] x 100 = -27.97%
Formula
Percentage change = [(170 - 236) / 236] x 100
Subtract the new number by the original number
170 - 236 = -66
-66 ÷ 236 = -0.2796610169491525
-0.2796610169491525 x 100 = -27.97%