-45.38% is the change from 487 to 266
Calculation steps:
[( 266 - 487 ) ÷ 487] x 100 = -45.38%
Formula
Percentage change = [(266 - 487) / 487] x 100
Subtract the new number by the original number
266 - 487 = -221
-221 ÷ 487 = -0.4537987679671458
-0.4537987679671458 x 100 = -45.38%