-97.67% is the change from 902 to 21
Calculation steps:
[( 21 - 902 ) ÷ 902] x 100 = -97.67%
Formula
Percentage change = [(21 - 902) / 902] x 100
Subtract the new number by the original number
21 - 902 = -881
-881 ÷ 902 = -0.9767184035476718
-0.9767184035476718 x 100 = -97.67%