19.05% is the change from 840 to 1000
Calculation steps:
[( 1000 - 840 ) ÷ 840] x 100 = 19.05%
Formula
Percentage change = [(1000 - 840) / 840] x 100
Subtract the new number by the original number
1000 - 840 = 160
160 ÷ 840 = 0.19047619047619047
0.19047619047619047 x 100 = 19.05%