2105.56% is the change from 18 to 397
Calculation steps:
[( 397 - 18 ) ÷ 18] x 100 = 2105.56%
Formula
Percentage change = [(397 - 18) / 18] x 100
Subtract the new number by the original number
397 - 18 = 379
379 ÷ 18 = 21.055555555555557
21.055555555555557 x 100 = 2105.56%