-75.31% is the change from 490 to 121
Calculation steps:
[( 121 - 490 ) ÷ 490] x 100 = -75.31%
Formula
Percentage change = [(121 - 490) / 490] x 100
Subtract the new number by the original number
121 - 490 = -369
-369 ÷ 490 = -0.753061224489796
-0.753061224489796 x 100 = -75.31%