1.97% is the change from 913 to 931
Calculation steps:
[( 931 - 913 ) ÷ 913] x 100 = 1.97%
Formula
Percentage change = [(931 - 913) / 913] x 100
Subtract the new number by the original number
931 - 913 = 18
18 ÷ 913 = 0.019715224534501644
0.019715224534501644 x 100 = 1.97%