-17.79% is the change from 770 to 633
Calculation steps:
[( 633 - 770 ) ÷ 770] x 100 = -17.79%
Formula
Percentage change = [(633 - 770) / 770] x 100
Subtract the new number by the original number
633 - 770 = -137
-137 ÷ 770 = -0.17792207792207793
-0.17792207792207793 x 100 = -17.79%