-93.89% is the change from 687 to 42
Calculation steps:
[( 42 - 687 ) ÷ 687] x 100 = -93.89%
Formula
Percentage change = [(42 - 687) / 687] x 100
Subtract the new number by the original number
42 - 687 = -645
-645 ÷ 687 = -0.9388646288209607
-0.9388646288209607 x 100 = -93.89%