A shoe collector owned $42$ pairs of Jordans in $2018.$ After much research and many online auctions,the shoe collector owned $112$ pairs of Jordans in $2022.$

a$.$ What is the absolute change in number of shoes owned from $2018$ to $2022?$

b$.$ What is the percent increase in number of shoes owned from $2018$ to $2022?$ Round to the nearesttenth of a percent.