-1.51% is the change from 992 to 977
Calculation steps:
[( 977 - 992 ) ÷ 992] x 100 = -1.51%
Formula
Percentage change = [(977 - 992) / 992] x 100
Subtract the new number by the original number
977 - 992 = -15
-15 ÷ 992 = -0.015120967741935484
-0.015120967741935484 x 100 = -1.51%