297% is the change from 100 to 397
Calculation steps:
[( 397 - 100 ) ÷ 100] x 100 = 297%
Formula
Percentage change = [(397 - 100) / 100] x 100
Subtract the new number by the original number
397 - 100 = 297
297 ÷ 100 = 2.97
2.97 x 100 = 297%
Example