-63.52% is the change from 647 to 236
Calculation steps:
[( 236 - 647 ) ÷ 647] x 100 = -63.52%
Formula
Percentage change = [(236 - 647) / 647] x 100
Subtract the new number by the original number
236 - 647 = -411
-411 ÷ 647 = -0.6352395672333848
-0.6352395672333848 x 100 = -63.52%