1371.21% is the change from 66 to 971
Calculation steps:
[( 971 - 66 ) ÷ 66] x 100 = 1371.21%
Formula
Percentage change = [(971 - 66) / 66] x 100
Subtract the new number by the original number
971 - 66 = 905
905 ÷ 66 = 13.712121212121213
13.712121212121213 x 100 = 1371.21%