-79.6% is the change from 990 to 202
Calculation steps:
[( 202 - 990 ) ÷ 990] x 100 = -79.6%
Formula
Percentage change = [(202 - 990) / 990] x 100
Subtract the new number by the original number
202 - 990 = -788
-788 ÷ 990 = -0.795959595959596
-0.795959595959596 x 100 = -79.6%