A fruit seller had some mangoes. He sells 30% mangoes and still has 280 mangoes. Find the number of mangoes he had. Choose one
A) 588 mangoes
B) 400 mangoes
C) 672 mangoes
D) 700 mangoes
E) None of these
Explanation:   Suppose originally he had X mangoes.   Then, (100 – 30)% of X = 280   70/100 * X = 280   X = (280 * 100) / 70= 
<gadget id="calculator">(280 * 100) / 70</gadget>
<output>400</output>
400   ANSWER: 400 mangoes
<result>B</result>
A fruit seller had some mangoes. He sells 30% mangoes and still has 280 mangoes. Find the number of mangoes he had.