91.1% is the change from 236 to 451
Calculation steps:
[( 451 - 236 ) ÷ 236] x 100 = 91.1%
Formula
Percentage change = [(451 - 236) / 236] x 100
Subtract the new number by the original number
451 - 236 = 215
215 ÷ 236 = 0.9110169491525424
0.9110169491525424 x 100 = 91.1%