Question

Which sum is equal to 3 1/4+1 2/5?

Answer 1

`\huge\boxed{\bf\: (93)/(20)=4.65}`

Explanation:

`3 \frac { 1 } { 4 } + 1 \frac { 2 } { 5 }`

Now,

`3 \frac { 1 } { 4 } \\= (4 * 3+1)/(4)\\= (13)/(4)`

Then,

`1 \frac { 2 } { 5 }\\= (1* 5+2)/(5) \\= (7)/(5)`

So,

`3 \frac { 1 } { 4 } + 1 \frac { 2 } { 5 }\\= (13)/(4)+(7)/(5)\\ \\\mathrm{LCM = 20}\\\\= (65)/(20)+(28)/(20) \\=\boxed{\bf\: (93)/(20)=4.65}`

`\rule{150pt}{2pt}`