-54.59% is the change from 687 to 312
Calculation steps:
[( 312 - 687 ) ÷ 687] x 100 = -54.59%
Formula
Percentage change = [(312 - 687) / 687] x 100
Subtract the new number by the original number
312 - 687 = -375
-375 ÷ 687 = -0.5458515283842795
-0.5458515283842795 x 100 = -54.59%