(a) To find 45% of what is 36, you can set up the equation:
\[ 0.45 \times x = 36 \]
To find \( x \), divide both sides by 0.45:
\[ x = \frac{36}{0.45} \]
Calculating this gives:
\[ x = 80 \]
So, 45% of 80 is 36.
(b) To find what number is 65% of 60, you can set up the equation:
\[ 0.65 \times 60 = y \]
Calculating this gives:
\[ y = 0.65 \times 60 = 39 \]
So, 65% of 60 is 39.
In summary: (a) 80 (b) 39