(3/4) + (3/4) = 6/4 6/4 / 2 = 3/2 3/2 converted to decimal equals 1.5 (i.e. One and a half cups)

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No, It's very correct.

A triangular prism has 9 sides. It has two triangular faces and three rectangular faces.

That is,  40 Percent Of 80 = (40/100) * 80                            = (40*80)/100                            = 32

6.12 = 153/25.

8/3. 1/3 = a no: * 1/8 a no: = (1/3) / (1/8) = 8/3.