1. The problem asks for the percentage of the monthly company budget spent last month on developing new collateral, which was 156384. 2. First, find the monthly company budget by dividing the annual budget by 12: $$\text{Monthly company budget} = \frac{2640000}{12} = 220000$$ 3. Next, calculate the percentage spent by dividing the amount spent by the monthly budget and multiplying by 100: $$\text{Percentage spent} = \frac{156384}{220000} \times 100 = 71.08\%$$ 4. Therefore, the percentage of the monthly company budget spent last month is 71.08%.