8.47% is the change from 236 to 256
Calculation steps:
[( 256 - 236 ) ÷ 236] x 100 = 8.47%
Formula
Percentage change = [(256 - 236) / 236] x 100
Subtract the new number by the original number
256 - 236 = 20
20 ÷ 236 = 0.0847457627118644
0.0847457627118644 x 100 = 8.47%