-79.62% is the change from 991 to 202
Calculation steps:
[( 202 - 991 ) ÷ 991] x 100 = -79.62%
Formula
Percentage change = [(202 - 991) / 991] x 100
Subtract the new number by the original number
202 - 991 = -789
-789 ÷ 991 = -0.7961654894046418
-0.7961654894046418 x 100 = -79.62%