Level 2
In a box, 40% of the pens are red pens and the rest are blue and black pens. The number of black pens is twice the number of blue pens. What percentage of the pens in the box are blue pens?
Level 2
2% of the people who signed up for their driving test were absent. Of those present, 57 passed the test. The rest failed. What percentage of the total number of people who signed up failed the test?