27.63% is the change from 666 to 850
Calculation steps:
[( 850 - 666 ) ÷ 666] x 100 = 27.63%
Formula
Percentage change = [(850 - 666) / 666] x 100
Subtract the new number by the original number
850 - 666 = 184
184 ÷ 666 = 0.27627627627627627
0.27627627627627627 x 100 = 27.63%