-54.14% is the change from 918 to 421
Calculation steps:
[( 421 - 918 ) ÷ 918] x 100 = -54.14%
Formula
Percentage change = [(421 - 918) / 918] x 100
Subtract the new number by the original number
421 - 918 = -497
-497 ÷ 918 = -0.5413943355119826
-0.5413943355119826 x 100 = -54.14%