30
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move one unshaded counter to the 3rd dish that only has two circles in it. You have 12 total counters ..9 are shaded 3 are not. fractions would be 9/12 and 3/4 (9 counters are shaded out of 12 total counters) and (3 dishes out of 4 are shaded)
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Two fifths of thirty = 30*2/5 = 60/5 = 12
12/5 or 12 over 5
Two fifths of 30 is calculated by multiplying 30 by 2/5. This can be simplified to 30 * 2/5 = 60/5 = 12. Therefore, two fifths of 30 is 12.