100% is the change from 152 to 304
Calculation steps:
[( 304 - 152 ) ÷ 152] x 100 = 100%
Formula
Percentage change = [(304 - 152) / 152] x 100
Subtract the new number by the original number
304 - 152 = 152
152 ÷ 152 = 1
1 x 100 = 100%
Example