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A dragon is given 630 ounces of magical potion to sustain her journey from Arlandia to Gargandua. While flying 4/7 of the distance, she drinks 2/9 of the potion. Suppose she continues to drink the magical potion at this rate for the remainder of her journey. How much potion remains when she reaches Gargandua?

Can someone help me with this question? I can't even start!
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Sagot :

Step-by-step explanation:

4/7 of distance = 2/9 of potion

=> 7/7 of distance = 2/9 * (7/4) = 7/18 of potion.

The dragon has used 7/18 of the potion for the journey, and only have 11/18 of it left.

Amount left = 630 ounces * 11/18 = 385 ounces.