3. No. of hours spent in safety training 30 40 50 60 70 80 90 100 110 No. of hours lost due to accidents 100 90 85 60 80 50 30 30 20 10 20
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
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1.
Age of a person, in years
11
12
13
14
15
17
18
19
Weight, in kilograms
40
42
38
35
51
48
48
50
47
2.
Age of a car, in years
0.5
1
1.5
4
4.5
6.
7.
Mileage, in km/liter
16
15
10
12
10
12
11
10
11
8.
20
%3D
6
45
3."
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No. of hours spent in
safety training
20
30
50
60
70
80
90
100
110
No. of hours lost due
to accidents
100
90
85
60
80
50
30
30
20
10
40"
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