-18.43% is the change from 662 to 540
Calculation steps:
[( 540 - 662 ) ÷ 662] x 100 = -18.43%
Formula
Percentage change = [(540 - 662) / 662] x 100
Subtract the new number by the original number
540 - 662 = -122
-122 ÷ 662 = -0.18429003021148035
-0.18429003021148035 x 100 = -18.43%