-32.94% is the change from 768 to 515
Calculation steps:
[( 515 - 768 ) ÷ 768] x 100 = -32.94%
Formula
Percentage change = [(515 - 768) / 768] x 100
Subtract the new number by the original number
515 - 768 = -253
-253 ÷ 768 = -0.3294270833333333
-0.3294270833333333 x 100 = -32.94%