1 ESO - Unit 08 - Exercises 1.8.1 - Percentages.

1. UNIT 08 March
1. Copy and complete this table:
𝟑𝟑𝟏𝟏
𝟓𝟓𝟎𝟎
56%
0.53
33%
𝟏𝟏𝟏𝟏𝟏𝟏
𝟐𝟐𝟐𝟐𝟐𝟐
0.12
2. Calculate:
𝒂𝒂) 𝟏𝟏𝟐𝟐% 𝒐𝒐𝒇𝒇 𝟑𝟑𝟖𝟖𝟖𝟖
𝒃𝒃) 𝟒𝟒𝟒𝟒% 𝒐𝒐𝒇𝒇 𝟔𝟔𝟓𝟓
𝒄𝒄) 𝟒𝟒% 𝒐𝒐𝒇𝒇 𝟏𝟏𝟕𝟕𝟕𝟕
𝒅𝒅) 𝟒𝟒𝟒𝟒% 𝒐𝒐𝒇𝒇 𝟏𝟏𝟎𝟎, 𝟎𝟎𝟎𝟎𝟎𝟎
3. Find the value of x:
𝒂𝒂) 𝒙𝒙% 𝒐𝒐𝒇𝒇 𝟐𝟐𝟎𝟎𝟎𝟎 = 𝟔𝟔𝟔𝟔
𝒃𝒃) 𝒙𝒙% 𝒐𝒐𝒇𝒇 𝟑𝟑𝟎𝟎𝟎𝟎 = 𝟏𝟏𝟓𝟓
𝒄𝒄) 𝒙𝒙% 𝒐𝒐𝒇𝒇 𝟐𝟐𝟎𝟎𝟎𝟎 = 𝟏𝟏𝟔𝟔𝟔𝟔
𝒅𝒅) 𝒙𝒙% 𝒐𝒐𝒇𝒇 𝟑𝟑𝟎𝟎𝟎𝟎 = 𝟕𝟕𝟓𝟓
Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.8.1.1

2. UNIT 08 March
4. A suit is designed from a material containing 12% cotton. If the suit weighs 275
grams, what is the weight of cotton in the suit?
5. A mathematics textbook has 520 pages. 25% of the pages are on number, 40%
are on algebra and the remainder are on shape. How many pages are there on
shape?
6. 35% of a population of 20,000 live in rental houses. How many people live in a
house in property?
Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.8.1.2

3. UNIT 08 March
7. A family buys a refrigerator that costs 840 € paying 30% in cash and the rest in 6
monthly instalments without surcharge. What is the amount of each month?
8. Andrea used to weigh 62 kg. After going on a diet she has reduced her weight by
24%. What is her new weight?
9. A meal costs £18 plus a 12% service charge. How much is the bill?
Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.8.1.3

4. UNIT 08 March
10. A skirt is originally priced at £39, but during a sale it is reduced by 35%. How
much does the skirt cost now?
11. Four boxes of biscuits weigh 2.4 kg. How much will five boxes equal to the
previous ones weigh?
12. A village had 250 inhabitants, but the population has decreased by 8%. What is
the current population?
Axel Cotón Gutiérrez Mathematics 1º ESO Exercises – 1.8.1.4