345% is the change from 100 to 445
Calculation steps:
[( 445 - 100 ) ÷ 100] x 100 = 345%
Formula
Percentage change = [(445 - 100) / 100] x 100
Subtract the new number by the original number
445 - 100 = 345
345 ÷ 100 = 3.45
3.45 x 100 = 345%
Example