1.64% is the change from 975 to 991
Calculation steps:
[( 991 - 975 ) ÷ 975] x 100 = 1.64%
Formula
Percentage change = [(991 - 975) / 975] x 100
Subtract the new number by the original number
991 - 975 = 16
16 ÷ 975 = 0.01641025641025641
0.01641025641025641 x 100 = 1.64%