-92.93% is the change from 990 to 70
Calculation steps:
[( 70 - 990 ) ÷ 990] x 100 = -92.93%
Formula
Percentage change = [(70 - 990) / 990] x 100
Subtract the new number by the original number
70 - 990 = -920
-920 ÷ 990 = -0.9292929292929293
-0.9292929292929293 x 100 = -92.93%