12/5 or 2 and 2/5
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4/5 of 35 is 28 To solve, divide 35 by five to get one fifth then multiply that by four. 35 divided by 5 = 7 (= 1 fifth) 7 x 4 = 28 (4 fifths)
Divide by five to get one fifth and then multiply by three to get three fifths: 30 ÷ 5 = 6 6 x 3 = 18
If you mean: 4 and 4/5 plus 3 and 3/5 then it is 42/5 or 8.4 as a decimal
four fifth of 12 =9.6 To work it out you have to divide 12 by five which is the denominator and then you will get the answer 2.4 then multiply 4 by 2.4 and the answer will equal to 9.6
3.2 x 4 = 12.8