-6% is the change from 50 to 47
Calculation steps:
[( 47 - 50 ) ÷ 50] x 100 = -6%
Formula
Percentage change = [(47 - 50) / 50] x 100
Subtract the new number by the original number
47 - 50 = -3
-3 ÷ 50 = -0.06
-0.06 x 100 = -6%
Example