The price of the jeans would be $30. 50% of 30 is 15. 30 + 15 = 45.
Yu would have to break it down so it not to descriptive. Or they will think it’s to boring.
These lines are spoken by a captain who has been wounded in the war. He is relaying the information about Macbeth's brave fight against the enemy to King Duncan. He talks about how brave and valiant Macbeth was, so the audience can infer that he is a fierce warrior who will stop at nothing to ensure his win in a battle.