-77.8% is the change from 410 to 91
Calculation steps:
[( 91 - 410 ) ÷ 410] x 100 = -77.8%
Formula
Percentage change = [(91 - 410) / 410] x 100
Subtract the new number by the original number
91 - 410 = -319
-319 ÷ 410 = -0.7780487804878049
-0.7780487804878049 x 100 = -77.8%