As part of a physical geography fieldwork enquiry, a group of students measured the mass of sediment samples (bedload) at 10 different sampling sites along a river transect from source to mouth.
Complete the table below to find the cumulative percentage for Site 9 and the cumulative total for Site 10.
| Increasing distance from river source | Site number | Sediment mass (g) | Cumulative total (g) | Cumulative percentage (%) |
|---|---|---|---|---|
| 1 | 300 | 300 | 15.0 | |
| 2 | 220 | 520 | 26.0 | |
| 3 | 280 | 800 | 40.0 | |
| 4 | 200 | 1000 | 50.0 | |
| 5 | 300 | 1300 | 65.0 | |
| 6 | 240 | 1540 | 77.0 | |
| 7 | 160 | 1700 | 85.0 | |
| 8 | 100 | 1800 | 90.0 | |
| 9 | 120 | 1920 | ||
| 10 | 80 | 100.0 |