-13.25% is the change from 634 to 550
Calculation steps:
[( 550 - 634 ) ÷ 634] x 100 = -13.25%
Formula
Percentage change = [(550 - 634) / 634] x 100
Subtract the new number by the original number
550 - 634 = -84
-84 ÷ 634 = -0.13249211356466878
-0.13249211356466878 x 100 = -13.25%