700% is the change from 66 to 528
Calculation steps:
[( 528 - 66 ) ÷ 66] x 100 = 700%
Formula
Percentage change = [(528 - 66) / 66] x 100
Subtract the new number by the original number
528 - 66 = 462
462 ÷ 66 = 7
7 x 100 = 700%
Example