-99% is the change from 301 to 3
Calculation steps:
[( 3 - 301 ) ÷ 301] x 100 = -99%
Formula
Percentage change = [(3 - 301) / 301] x 100
Subtract the new number by the original number
3 - 301 = -298
-298 ÷ 301 = -0.9900332225913622
-0.9900332225913622 x 100 = -99%