1506.25% is the change from 16 to 257
Calculation steps:
[( 257 - 16 ) ÷ 16] x 100 = 1506.25%
Formula
Percentage change = [(257 - 16) / 16] x 100
Subtract the new number by the original number
257 - 16 = 241
241 ÷ 16 = 15.0625
15.0625 x 100 = 1506.25%