Find the value of `:`
21.05-15.27

Answer

To solve the problem \( 21.05 - 15.27 \), we will follow these steps:

### Step 1: Align the Numbers
We start by writing the numbers one below the other, making sure to align the decimal points.

```
21.05
- 15.27
```

### Step 2: Subtract the Hundredths Place
We begin with the rightmost column (the hundredths place). We have:
- \( 5 - 7 \)

Since we cannot subtract 7 from 5, we need to borrow from the tenths place.

### Step 3: Borrow from the Tenths Place
We look at the tenths place:
- The tenths place has \( 0 \) (from \( 21.05 \)), so we need to borrow from the units place (the 21).

When we borrow 1 from the 21, it becomes 20, and the 0 in the tenths place becomes 10 (because we borrowed 10 tenths).

Now we can perform the subtraction:
- The hundredths place is now \( 15 \) (because we borrowed 1, making it 15).
- So, \( 15 - 7 = 8 \).

### Step 4: Subtract the Tenths Place
Next, we move to the tenths place:
- Now we have \( 10 - 2 \).
- So, \( 10 - 2 = 8 \).

### Step 5: Subtract the Units Place
Finally, we subtract the units place:
- We have \( 20 - 15 \).
- So, \( 20 - 15 = 5 \).

### Step 6: Combine the Results
Now we combine the results from each column:
- From the units place, we have \( 5 \).
- From the tenths place, we have \( 8 \).
- From the hundredths place, we have \( 8 \).

Thus, the final answer is:
```
21.05
- 15.27
-------
5.78
```

### Final Answer
The value of \( 21.05 - 15.27 \) is \( 5.78 \).

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