7.4% is the change from 770 to 827
Calculation steps:
[( 827 - 770 ) ÷ 770] x 100 = 7.4%
Formula
Percentage change = [(827 - 770) / 770] x 100
Subtract the new number by the original number
827 - 770 = 57
57 ÷ 770 = 0.07402597402597402
0.07402597402597402 x 100 = 7.4%