100% is the change from 456 to 912
Calculation steps:
[( 912 - 456 ) ÷ 456] x 100 = 100%
Formula
Percentage change = [(912 - 456) / 456] x 100
Subtract the new number by the original number
912 - 456 = 456
456 ÷ 456 = 1
1 x 100 = 100%
Example