-18.44% is the change from 770 to 628
Calculation steps:
[( 628 - 770 ) ÷ 770] x 100 = -18.44%
Formula
Percentage change = [(628 - 770) / 770] x 100
Subtract the new number by the original number
628 - 770 = -142
-142 ÷ 770 = -0.18441558441558442
-0.18441558441558442 x 100 = -18.44%