21.95% is the change from 770 to 939
Calculation steps:
[( 939 - 770 ) ÷ 770] x 100 = 21.95%
Formula
Percentage change = [(939 - 770) / 770] x 100
Subtract the new number by the original number
939 - 770 = 169
169 ÷ 770 = 0.21948051948051947
0.21948051948051947 x 100 = 21.95%