-40.49% is the change from 768 to 457
Calculation steps:
[( 457 - 768 ) ÷ 768] x 100 = -40.49%
Formula
Percentage change = [(457 - 768) / 768] x 100
Subtract the new number by the original number
457 - 768 = -311
-311 ÷ 768 = -0.4049479166666667
-0.4049479166666667 x 100 = -40.49%