-16.34% is the change from 765 to 640
Calculation steps:
[( 640 - 765 ) ÷ 765] x 100 = -16.34%
Formula
Percentage change = [(640 - 765) / 765] x 100
Subtract the new number by the original number
640 - 765 = -125
-125 ÷ 765 = -0.16339869281045752
-0.16339869281045752 x 100 = -16.34%