978.89% is the change from 90 to 971
Calculation steps:
[( 971 - 90 ) ÷ 90] x 100 = 978.89%
Formula
Percentage change = [(971 - 90) / 90] x 100
Subtract the new number by the original number
971 - 90 = 881
881 ÷ 90 = 9.78888888888889
9.78888888888889 x 100 = 978.89%