15.88% is the change from 277 to 321
Calculation steps:
[( 321 - 277 ) ÷ 277] x 100 = 15.88%
Formula
Percentage change = [(321 - 277) / 277] x 100
Subtract the new number by the original number
321 - 277 = 44
44 ÷ 277 = 0.1588447653429603
0.1588447653429603 x 100 = 15.88%