915.15% is the change from 66 to 670
Calculation steps:
[( 670 - 66 ) ÷ 66] x 100 = 915.15%
Formula
Percentage change = [(670 - 66) / 66] x 100
Subtract the new number by the original number
670 - 66 = 604
604 ÷ 66 = 9.151515151515152
9.151515151515152 x 100 = 915.15%