-18.96% is the change from 770 to 624
Calculation steps:
[( 624 - 770 ) ÷ 770] x 100 = -18.96%
Formula
Percentage change = [(624 - 770) / 770] x 100
Subtract the new number by the original number
624 - 770 = -146
-146 ÷ 770 = -0.18961038961038962
-0.18961038961038962 x 100 = -18.96%