This document contains a mathematics worksheet with 12 problems involving percentages. The problems include calculating percentages of numbers, finding percentages of totals, determining percentage reductions of prices, and calculating weights and populations that have increased or decreased by a given percentage. The document provides the exercises and their numbering but does not show the steps or answers.

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