-25.57% is the change from 700 to 521
Calculation steps:
[( 521 - 700 ) ÷ 700] x 100 = -25.57%
Formula
Percentage change = [(521 - 700) / 700] x 100
Subtract the new number by the original number
521 - 700 = -179
-179 ÷ 700 = -0.2557142857142857
-0.2557142857142857 x 100 = -25.57%