-90% is the change from 470 to 47
Calculation steps:
[( 47 - 470 ) ÷ 470] x 100 = -90%
Formula
Percentage change = [(47 - 470) / 470] x 100
Subtract the new number by the original number
47 - 470 = -423
-423 ÷ 470 = -0.9
-0.9 x 100 = -90%
Example