31.36% is the change from 287 to 377
Calculation steps:
[( 377 - 287 ) ÷ 287] x 100 = 31.36%
Formula
Percentage change = [(377 - 287) / 287] x 100
Subtract the new number by the original number
377 - 287 = 90
90 ÷ 287 = 0.313588850174216
0.313588850174216 x 100 = 31.36%