date percentage of childrem between the ages
of 10 and 15 who worked
1890 18.1
1900 18.2
1910 15.0
1920 11. 3

1. according to the chart, how did the percentage of working children between the ages of 10 and 15 change from 1890 to 1920?

2. give two reasons that would explain the change in the graph above