753.85% is the change from 78 to 666
Calculation steps:
[( 666 - 78 ) ÷ 78] x 100 = 753.85%
Formula
Percentage change = [(666 - 78) / 78] x 100
Subtract the new number by the original number
666 - 78 = 588
588 ÷ 78 = 7.538461538461538
7.538461538461538 x 100 = 753.85%