-15.55% is the change from 328 to 277
Calculation steps:
[( 277 - 328 ) ÷ 328] x 100 = -15.55%
Formula
Percentage change = [(277 - 328) / 328] x 100
Subtract the new number by the original number
277 - 328 = -51
-51 ÷ 328 = -0.15548780487804878
-0.15548780487804878 x 100 = -15.55%