949.18% is the change from 61 to 640
Calculation steps:
[( 640 - 61 ) ÷ 61] x 100 = 949.18%
Formula
Percentage change = [(640 - 61) / 61] x 100
Subtract the new number by the original number
640 - 61 = 579
579 ÷ 61 = 9.491803278688524
9.491803278688524 x 100 = 949.18%