21.22% is the change from 311 to 377
Calculation steps:
[( 377 - 311 ) ÷ 311] x 100 = 21.22%
Formula
Percentage change = [(377 - 311) / 311] x 100
Subtract the new number by the original number
377 - 311 = 66
66 ÷ 311 = 0.21221864951768488
0.21221864951768488 x 100 = 21.22%