15% is the change from 320 to 368
Calculation steps:
[( 368 - 320 ) ÷ 320] x 100 = 15%
Formula
Percentage change = [(368 - 320) / 320] x 100
Subtract the new number by the original number
368 - 320 = 48
48 ÷ 320 = 0.15
0.15 x 100 = 15%
Example