-5.45% is the change from 899 to 850
Calculation steps:
[( 850 - 899 ) ÷ 899] x 100 = -5.45%
Formula
Percentage change = [(850 - 899) / 899] x 100
Subtract the new number by the original number
850 - 899 = -49
-49 ÷ 899 = -0.054505005561735265
-0.054505005561735265 x 100 = -5.45%