692.5% is the change from 80 to 634
Calculation steps:
[( 634 - 80 ) ÷ 80] x 100 = 692.5%
Formula
Percentage change = [(634 - 80) / 80] x 100
Subtract the new number by the original number
634 - 80 = 554
554 ÷ 80 = 6.925
6.925 x 100 = 692.5%
Example