-38.78% is the change from 49 to 30
Calculation steps:
[( 30 - 49 ) ÷ 49] x 100 = -38.78%
Formula
Percentage change = [(30 - 49) / 49] x 100
Subtract the new number by the original number
30 - 49 = -19
-19 ÷ 49 = -0.3877551020408163
-0.3877551020408163 x 100 = -38.78%