-36.11% is the change from 216 to 138
Calculation steps:
[( 138 - 216 ) ÷ 216] x 100 = -36.11%
Formula
Percentage change = [(138 - 216) / 216] x 100
Subtract the new number by the original number
138 - 216 = -78
-78 ÷ 216 = -0.3611111111111111
-0.3611111111111111 x 100 = -36.11%