-32.16% is the change from 768 to 521
Calculation steps:
[( 521 - 768 ) ÷ 768] x 100 = -32.16%
Formula
Percentage change = [(521 - 768) / 768] x 100
Subtract the new number by the original number
521 - 768 = -247
-247 ÷ 768 = -0.3216145833333333
-0.3216145833333333 x 100 = -32.16%