20.57% is the change from 705 to 850
Calculation steps:
[( 850 - 705 ) ÷ 705] x 100 = 20.57%
Formula
Percentage change = [(850 - 705) / 705] x 100
Subtract the new number by the original number
850 - 705 = 145
145 ÷ 705 = 0.20567375886524822
0.20567375886524822 x 100 = 20.57%