245% is the change from 100 to 345
Calculation steps:
[( 345 - 100 ) ÷ 100] x 100 = 245%
Formula
Percentage change = [(345 - 100) / 100] x 100
Subtract the new number by the original number
345 - 100 = 245
245 ÷ 100 = 2.45
2.45 x 100 = 245%
Example