-57.14% is the change from 7 to 3
Calculation steps:
[( 3 - 7 ) ÷ 7] x 100 = -57.14%
Formula
Percentage change = [(3 - 7) / 7] x 100
Subtract the new number by the original number
3 - 7 = -4
-4 ÷ 7 = -0.5714285714285714
-0.5714285714285714 x 100 = -57.14%