-32.6% is the change from 770 to 519
Calculation steps:
[( 519 - 770 ) ÷ 770] x 100 = -32.6%
Formula
Percentage change = [(519 - 770) / 770] x 100
Subtract the new number by the original number
519 - 770 = -251
-251 ÷ 770 = -0.32597402597402597
-0.32597402597402597 x 100 = -32.6%