-20.7% is the change from 488 to 387
Calculation steps:
[( 387 - 488 ) ÷ 488] x 100 = -20.7%
Formula
Percentage change = [(387 - 488) / 488] x 100
Subtract the new number by the original number
387 - 488 = -101
-101 ÷ 488 = -0.2069672131147541
-0.2069672131147541 x 100 = -20.7%