-34.13% is the change from 791 to 521
Calculation steps:
[( 521 - 791 ) ÷ 791] x 100 = -34.13%
Formula
Percentage change = [(521 - 791) / 791] x 100
Subtract the new number by the original number
521 - 791 = -270
-270 ÷ 791 = -0.3413400758533502
-0.3413400758533502 x 100 = -34.13%