83.44% is the change from 320 to 587
Calculation steps:
[( 587 - 320 ) ÷ 320] x 100 = 83.44%
Formula
Percentage change = [(587 - 320) / 320] x 100
Subtract the new number by the original number
587 - 320 = 267
267 ÷ 320 = 0.834375
0.834375 x 100 = 83.44%