-3.99% is the change from 902 to 866
Calculation steps:
[( 866 - 902 ) ÷ 902] x 100 = -3.99%
Formula
Percentage change = [(866 - 902) / 902] x 100
Subtract the new number by the original number
866 - 902 = -36
-36 ÷ 902 = -0.03991130820399113
-0.03991130820399113 x 100 = -3.99%