10% is the change from 320 to 352
Calculation steps:
[( 352 - 320 ) ÷ 320] x 100 = 10%
Formula
Percentage change = [(352 - 320) / 320] x 100
Subtract the new number by the original number
352 - 320 = 32
32 ÷ 320 = 0.1
0.1 x 100 = 10%
Example