-18.39% is the change from 647 to 528
Calculation steps:
[( 528 - 647 ) ÷ 647] x 100 = -18.39%
Formula
Percentage change = [(528 - 647) / 647] x 100
Subtract the new number by the original number
528 - 647 = -119
-119 ÷ 647 = -0.1839258114374034
-0.1839258114374034 x 100 = -18.39%