-68.09% is the change from 47 to 15
Calculation steps:
[( 15 - 47 ) ÷ 47] x 100 = -68.09%
Formula
Percentage change = [(15 - 47) / 47] x 100
Subtract the new number by the original number
15 - 47 = -32
-32 ÷ 47 = -0.6808510638297872
-0.6808510638297872 x 100 = -68.09%