-79.9% is the change from 602 to 121
Calculation steps:
[( 121 - 602 ) ÷ 602] x 100 = -79.9%
Formula
Percentage change = [(121 - 602) / 602] x 100
Subtract the new number by the original number
121 - 602 = -481
-481 ÷ 602 = -0.7990033222591362
-0.7990033222591362 x 100 = -79.9%