-61.28% is the change from 687 to 266
Calculation steps:
[( 266 - 687 ) ÷ 687] x 100 = -61.28%
Formula
Percentage change = [(266 - 687) / 687] x 100
Subtract the new number by the original number
266 - 687 = -421
-421 ÷ 687 = -0.6128093158660844
-0.6128093158660844 x 100 = -61.28%