-18.7% is the change from 647 to 526
Calculation steps:
[( 526 - 647 ) ÷ 647] x 100 = -18.7%
Formula
Percentage change = [(526 - 647) / 647] x 100
Subtract the new number by the original number
526 - 647 = -121
-121 ÷ 647 = -0.18701700154559506
-0.18701700154559506 x 100 = -18.7%