842.86% is the change from 7 to 66
Calculation steps:
[( 66 - 7 ) ÷ 7] x 100 = 842.86%
Formula
Percentage change = [(66 - 7) / 7] x 100
Subtract the new number by the original number
66 - 7 = 59
59 ÷ 7 = 8.428571428571429
8.428571428571429 x 100 = 842.86%