47.04% is the change from 270 to 397
Calculation steps:
[( 397 - 270 ) ÷ 270] x 100 = 47.04%
Formula
Percentage change = [(397 - 270) / 270] x 100
Subtract the new number by the original number
397 - 270 = 127
127 ÷ 270 = 0.4703703703703704
0.4703703703703704 x 100 = 47.04%