-29.37% is the change from 715 to 505
Calculation steps:
[( 505 - 715 ) ÷ 715] x 100 = -29.37%
Formula
Percentage change = [(505 - 715) / 715] x 100
Subtract the new number by the original number
505 - 715 = -210
-210 ÷ 715 = -0.2937062937062937
-0.2937062937062937 x 100 = -29.37%