76.47% is the change from 51 to 90
Calculation steps:
[( 90 - 51 ) ÷ 51] x 100 = 76.47%
Formula
Percentage change = [(90 - 51) / 51] x 100
Subtract the new number by the original number
90 - 51 = 39
39 ÷ 51 = 0.7647058823529411
0.7647058823529411 x 100 = 76.47%