Arif read in a recipe that when fresh corn is dried, its weight decreases by $\%20$, and when dried corn is popped, its weight decreases by $\%10$. Then, in accordance with these ratios, he bought enough fresh corn to obtain 720 grams of popped corn. After drying and popping all the fresh corn he bought, Arif obtained less popped corn than he wanted, and he realized that this was due to an error in the recipe, and that the ratio written as $\%20$ should actually be $\%30$. Accordingly, how many grams of popped corn did Arif obtain? A) 630 B) 640 C) 660 D) 680 E) 690
Arif read in a recipe that when fresh corn is dried, its weight decreases by $\%20$, and when dried corn is popped, its weight decreases by $\%10$. Then, in accordance with these ratios, he bought enough fresh corn to obtain 720 grams of popped corn.
After drying and popping all the fresh corn he bought, Arif obtained less popped corn than he wanted, and he realized that this was due to an error in the recipe, and that the ratio written as $\%20$ should actually be $\%30$.
Accordingly, how many grams of popped corn did Arif obtain?
A) 630\\
B) 640\\
C) 660\\
D) 680\\
E) 690