-71.43% is the change from 63 to 18
Calculation steps:
[( 18 - 63 ) ÷ 63] x 100 = -71.43%
Formula
Percentage change = [(18 - 63) / 63] x 100
Subtract the new number by the original number
18 - 63 = -45
-45 ÷ 63 = -0.7142857142857143
-0.7142857142857143 x 100 = -71.43%