39.76% is the change from 420 to 587
Calculation steps:
[( 587 - 420 ) ÷ 420] x 100 = 39.76%
Formula
Percentage change = [(587 - 420) / 420] x 100
Subtract the new number by the original number
587 - 420 = 167
167 ÷ 420 = 0.3976190476190476
0.3976190476190476 x 100 = 39.76%