-30.13% is the change from 770 to 538
Calculation steps:
[( 538 - 770 ) ÷ 770] x 100 = -30.13%
Formula
Percentage change = [(538 - 770) / 770] x 100
Subtract the new number by the original number
538 - 770 = -232
-232 ÷ 770 = -0.3012987012987013
-0.3012987012987013 x 100 = -30.13%