3450% is the change from 10 to 355
Calculation steps:
[( 355 - 10 ) ÷ 10] x 100 = 3450%
Formula
Percentage change = [(355 - 10) / 10] x 100
Subtract the new number by the original number
355 - 10 = 345
345 ÷ 10 = 34.5
34.5 x 100 = 3450%
Example