218.75% is the change from 16 to 51
Calculation steps:
[( 51 - 16 ) ÷ 16] x 100 = 218.75%
Formula
Percentage change = [(51 - 16) / 16] x 100
Subtract the new number by the original number
51 - 16 = 35
35 ÷ 16 = 2.1875
2.1875 x 100 = 218.75%
Example