Answer:
-29.41%
Explanation:
Original number of Pokemon cards with Joe = 85
Updated number of Pokemon cards after sale = 60
Percentage change =
![\[(Updated-Original)/(Original)*100\]](https://img.qammunity.org/2020/formulas/mathematics/high-school/fcaq65uwftwup8lsqy2z4cregbvbtt8s0n.png)
=
![\[(60-85)/(85)*100\]](https://img.qammunity.org/2020/formulas/mathematics/high-school/inbypk4i0jijiig1j4fbuujqu6dnyz9j34.png)
=
![\[-0.2941*100\]](https://img.qammunity.org/2020/formulas/mathematics/high-school/45azxgbcz07d3rr9cenony2ifcqg01sgif.png)
=-29.41%
Hence the percentage change in Pokemon cards for Joe is -29.41%
The negative sign is due to the fact that the number of cards has decreaased from the original.