__Step 1:__

__From the given question, identify the ratio in which the given quantity is to be divided.__

__Step 2:__

__Take a common multiple (say $x$) and find each part in terms of $x$.__

**For eg**: If we have to divide a number in two parts having ratio $3:2$ then,

let the common multiple be $x$.

Hence the two parts are $3x$ and $2x$

__Step 3__

Apply the condition that ,

$Sumoftheparts=Whole$ and find value of $x$

Using the value of $x$ ,each part can be calculated

**Example:**Divide 105,such that the parts are in ratio $3:2$

Solution:

__Step 1:__

We have to divide the number $105$ in ratio $3:2$

__Step 2:__

Let the common multiple be $x$

$∴$ the parts are $3x$ and $2x$

__Step 3:__

Sum of the two parts $=105$

$∴3x+2x=105$

$∴5x=105$

$∴x=21$

Hence the parts are $3x=3×21=63$ and $2x=2×21=42$