Mitmesugused ülesanded.
1. Leia arv, kui 50-st protsendist arvust
| 10% on 9 | 120% on 34 | 8% on 1200 |
| 67% on 19 | 300% on 50 | 19% on 46 |
2. Leia arv, kui 120-st protsendist arvust
| 50% on 60 |  on 350 |
 on 75 |
| 16% on 18 | 68% on 133 | 4% on 3500 |
3. Lahenda vőrrand.
| x ˇ 2,5 - 2,4 = 2,3 | a + 
=  |
2 ˇ c = 4 |
| 25 ˇ =
(240 ˇ x) : |
1,5 ˇ  +
8 = d |
r = 1,3 +  |
4. Leia 24% arvudest 9; 6,25; 2502; 
.