-4.71% is the change from 340 to 324
Calculation steps:
[( 324 - 340 ) ÷ 340] x 100 = -4.71%
Formula
Percentage change = [(324 - 340) / 340] x 100
Subtract the new number by the original number
324 - 340 = -16
-16 ÷ 340 = -0.047058823529411764
-0.047058823529411764 x 100 = -4.71%