-92.3% is the change from 909 to 70
Calculation steps:
[( 70 - 909 ) ÷ 909] x 100 = -92.3%
Formula
Percentage change = [(70 - 909) / 909] x 100
Subtract the new number by the original number
70 - 909 = -839
-839 ÷ 909 = -0.922992299229923
-0.922992299229923 x 100 = -92.3%