4828.57% is the change from 7 to 345
Calculation steps:
[( 345 - 7 ) ÷ 7] x 100 = 4828.57%
Formula
Percentage change = [(345 - 7) / 7] x 100
Subtract the new number by the original number
345 - 7 = 338
338 ÷ 7 = 48.285714285714285
48.285714285714285 x 100 = 4828.57%