378.31% is the change from 83 to 397
Calculation steps:
[( 397 - 83 ) ÷ 83] x 100 = 378.31%
Formula
Percentage change = [(397 - 83) / 83] x 100
Subtract the new number by the original number
397 - 83 = 314
314 ÷ 83 = 3.783132530120482
3.783132530120482 x 100 = 378.31%