82.14% is the change from 28 to 51
Calculation steps:
[( 51 - 28 ) ÷ 28] x 100 = 82.14%
Formula
Percentage change = [(51 - 28) / 28] x 100
Subtract the new number by the original number
51 - 28 = 23
23 ÷ 28 = 0.8214285714285714
0.8214285714285714 x 100 = 82.14%