Answer:
Let's denote the whole number as \( x \).
According to the given information:
1. Multiply the whole number by 0.8: \( 0.8x \).
2. Add the result to 14.4: \( 0.8x + 14.4 \).
3. The sum should equal 20: \( 0.8x + 14.4 = 20 \).
To solve for \( x \):
\[ 0.8x + 14.4 = 20 \]
\[ 0.8x = 20 - 14.4 \]
\[ 0.8x = 5.6 \]
\[ x = \frac{5.6}{0.8} \]
\[ x = 7 \]
So, the whole number is 7.
