991.8% is the change from 61 to 666
Calculation steps:
[( 666 - 61 ) ÷ 61] x 100 = 991.8%
Formula
Percentage change = [(666 - 61) / 61] x 100
Subtract the new number by the original number
666 - 61 = 605
605 ÷ 61 = 9.918032786885245
9.918032786885245 x 100 = 991.8%