-31.8% is the change from 217 to 148
Calculation steps:
[( 148 - 217 ) ÷ 217] x 100 = -31.8%
Formula
Percentage change = [(148 - 217) / 217] x 100
Subtract the new number by the original number
148 - 217 = -69
-69 ÷ 217 = -0.31797235023041476
-0.31797235023041476 x 100 = -31.8%