-92.4% is the change from 842 to 64
Calculation steps:
[( 64 - 842 ) ÷ 842] x 100 = -92.4%
Formula
Percentage change = [(64 - 842) / 842] x 100
Subtract the new number by the original number
64 - 842 = -778
-778 ÷ 842 = -0.9239904988123515
-0.9239904988123515 x 100 = -92.4%