68% is the change from 50 to 84
Calculation steps:
[( 84 - 50 ) ÷ 50] x 100 = 68%
Formula
Percentage change = [(84 - 50) / 50] x 100
Subtract the new number by the original number
84 - 50 = 34
34 ÷ 50 = 0.68
0.68 x 100 = 68%
Example