Description for Correct answer:
60% of 540 + 45% of ? = 468

\( 540 \times \frac{60}{100} + ? \times \frac{45}{100} = 468\)

\( 324 + ? \times \frac{45}{100} = 468\)

\( ? \times \frac{45}{100}=468-324 \)

\( ? \times \frac{45}{100}=144 \)

? = 320