2.15% is the change from 977 to 998
Calculation steps:
[( 998 - 977 ) ÷ 977] x 100 = 2.15%
Formula
Percentage change = [(998 - 977) / 977] x 100
Subtract the new number by the original number
998 - 977 = 21
21 ÷ 977 = 0.021494370522006142
0.021494370522006142 x 100 = 2.15%