500
On your white board, draw 14 circles. Shade 5/7 of the circles. How many are shaded?
10
(If I split 14 circles up into 7 equal groups, there are 2 in each group. I would have 7 groups of 2.
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If I shade 5/7 of the circles, that would be 5 groups. Since each group has 2 circles, 5x2=10.) You could also say that for every 7 circles you have, 5 are shaded.