983.61% is the change from 61 to 661
Calculation steps:
[( 661 - 61 ) ÷ 61] x 100 = 983.61%
Formula
Percentage change = [(661 - 61) / 61] x 100
Subtract the new number by the original number
661 - 61 = 600
600 ÷ 61 = 9.836065573770492
9.836065573770492 x 100 = 983.61%