-27.87% is the change from 897 to 647
Calculation steps:
[( 647 - 897 ) ÷ 897] x 100 = -27.87%
Formula
Percentage change = [(647 - 897) / 897] x 100
Subtract the new number by the original number
647 - 897 = -250
-250 ÷ 897 = -0.2787068004459309
-0.2787068004459309 x 100 = -27.87%