400% is the change from 10 to 50
Calculation steps:
[( 50 - 10 ) ÷ 10] x 100 = 400%
Formula
Percentage change = [(50 - 10) / 10] x 100
Subtract the new number by the original number
50 - 10 = 40
40 ÷ 10 = 4
4 x 100 = 400%
Example