-33.51% is the change from 767 to 510
Calculation steps:
[( 510 - 767 ) ÷ 767] x 100 = -33.51%
Formula
Percentage change = [(510 - 767) / 767] x 100
Subtract the new number by the original number
510 - 767 = -257
-257 ÷ 767 = -0.3350717079530639
-0.3350717079530639 x 100 = -33.51%