1071.21% is the change from 66 to 773
Calculation steps:
[( 773 - 66 ) ÷ 66] x 100 = 1071.21%
Formula
Percentage change = [(773 - 66) / 66] x 100
Subtract the new number by the original number
773 - 66 = 707
707 ÷ 66 = 10.712121212121213
10.712121212121213 x 100 = 1071.21%