Step 1: Called-up capital meaning.
Called-up capital is the portion of subscribed capital which the company has asked shareholders to pay.
Step 2: Paid-up capital meaning.
Paid-up capital is the actual amount received from shareholders out of the called-up capital.
Step 3: Adjustment.
If some shareholders fail to pay the called-up amount, it is called “Calls-in-arrear”. Therefore,
\[
\text{Paid-up Capital} = \text{Called-up Capital} - \text{Calls-in-arrear}
\]
Step 4: Conclude.
Hence, Calls-in-arrear is deducted from called-up capital to arrive at paid-up capital.
Final Answer:
\[
\boxed{\text{Calls-in-arrear}}
\]