-92.72% is the change from 687 to 50
Calculation steps:
[( 50 - 687 ) ÷ 687] x 100 = -92.72%
Formula
Percentage change = [(50 - 687) / 687] x 100
Subtract the new number by the original number
50 - 687 = -637
-637 ÷ 687 = -0.9272197962154294
-0.9272197962154294 x 100 = -92.72%