-29.36% is the change from 487 to 344
Calculation steps:
[( 344 - 487 ) ÷ 487] x 100 = -29.36%
Formula
Percentage change = [(344 - 487) / 487] x 100
Subtract the new number by the original number
344 - 487 = -143
-143 ÷ 487 = -0.2936344969199179
-0.2936344969199179 x 100 = -29.36%