300% is the change from 16 to 64
Calculation steps:
[( 64 - 16 ) ÷ 16] x 100 = 300%
Formula
Percentage change = [(64 - 16) / 16] x 100
Subtract the new number by the original number
64 - 16 = 48
48 ÷ 16 = 3
3 x 100 = 300%
Example