-15.12% is the change from 324 to 275
Calculation steps:
[( 275 - 324 ) ÷ 324] x 100 = -15.12%
Formula
Percentage change = [(275 - 324) / 324] x 100
Subtract the new number by the original number
275 - 324 = -49
-49 ÷ 324 = -0.15123456790123457
-0.15123456790123457 x 100 = -15.12%