A supermarket stocked 210 kg of sugar. 55% was sold in a week. How many kilograms of sugar were left unsold at the end of that week? Answer as a decimal if needed.

To determine how many kilograms of sugar were left unsold at the end of the week, follow these steps:

1. **Calculate the amount of sugar sold**:
   \[
   \text{Amount sold} = 55\% \text{ of } 210 \, \text{kg}
   \]
   \[
   \text{Amount sold} = \frac{55}{100} \times 210 = 0.55 \times 210 = 115.5 \, \text{kg}
   \]

2. **Calculate the amount of sugar left unsold**:
   \[
   \text{Amount unsold} = 210 \, \text{kg} - 115.5 \, \text{kg} = 94.5 \, \text{kg}
   \]

So, **94.5 kilograms** of sugar were left unsold at the end of the week.

Would you like more details or have any questions? Here are some related questions you might consider:

1. What percentage of the sugar was left unsold?
2. If the supermarket sold 30 kg of sugar the next week, how much would be left?
3. What if the supermarket stocked 300 kg instead, with the same percentage sold?
4. How would the calculation change if only 45% was sold in the first week?
5. If the supermarket wanted to have only 50 kg of sugar left, what percentage should it aim to sell?
6. What is the total revenue if each kilogram of sugar is sold at $2 per kg?
7. How many kilograms would need to be sold to have exactly 80 kg left?
8. If the sale rate increases by 10% each week, how much would be sold in the second week?

**Tip:** When calculating percentages, always convert the percentage to a decimal by dividing by 100.

Discover how much sugar remains after selling 55% of 210 kg with a step-by-step solution. This problem involves basic percentage calculations and subtraction. Suitable for Grades 5-6 students learning about percentages and basic arithmetic.

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