15.63% is the change from 320 to 370
Calculation steps:
[( 370 - 320 ) ÷ 320] x 100 = 15.63%
Formula
Percentage change = [(370 - 320) / 320] x 100
Subtract the new number by the original number
370 - 320 = 50
50 ÷ 320 = 0.15625
0.15625 x 100 = 15.63%