One US dollar is the equivalent of 7 Namibian dollars.  One US dollar is also the equivalent of 6 Chinese yuan. If a painting costs 105 Namibian dollars, how much would it cost in Chinese yuan?
I want to compare the cost of the painting in Namibian dollars and Chinese yuan, but they are both linked to the US dollar. So I can use the US dollar as a common currency to convert between them. First, I need to find out how many US dollars the painting costs. I can do this by dividing the cost in Namibian dollars by the exchange rate of 7 Namibian dollars per US dollar. So 105 Namibian dollars divided by 7 is 15 US dollars. Now I have the cost in US dollars, I can convert it to Chinese yuan by multiplying by the exchange rate of 6 Chinese yuan per US dollar. So 15 US dollars times 6 is 90 Chinese yuan. Therefore, the painting costs 90 Chinese yuan. 