-63.37% is the change from 647 to 237
Calculation steps:
[( 237 - 647 ) ÷ 647] x 100 = -63.37%
Formula
Percentage change = [(237 - 647) / 647] x 100
Subtract the new number by the original number
237 - 647 = -410
-410 ÷ 647 = -0.633693972179289
-0.633693972179289 x 100 = -63.37%