TOPIC 3: DECIMAL AND PERCENTAGE
Explain the concept of decimals
A decimal- is defined as a number which consist of two parts separated by a point.The parts are whole number part and fractional part
Conversion of Fractions to Terminating Decimals and Vice Versa
Convert fractions to terminating decimals and vice versa
The first place after the decimal point is called tenths.The second place after the decimal point is called hundredths e.t.c
Consider the decimal number 8.152
To convert a fraction into decimal, divide the numerator by denominator
To convert a decimal into fraction, write the digits after the decimal point as tenths, or hundredths or thousandths depending on the number of decimal places.
Convert the following fractions into decimals
Divide the numerator by denominator
Operations and Decimals
Addition of Decimals
Subtraction of Decimals
Multiplication of Decimals
Mixed Operations with Decimals
Perform mixed operations with decimals
Word Problems Involving Decimals
Solve word problems involving decimals
If 58 out of 100 students in a school are boys, then write a decimal for the part of the school that consists of boys.
We can write a fraction and a decimal for the part of the school that consists of boys.
Expressing a Quantity as a Percentage
Express a quantity as a percentage
The percentage of a quantity is found by converting the percentage to a fraction or decimal and then multiply it by the quantity.
The concept of percentage of a quantity can be used to solve the problems involving percentage increase and decrease as shown in the below examples:-
A Fractions into Percentage and Vice Versa
Convert a fraction into percentage and vice versa
To change a fraction or a decimal into a percentage, multiply it by 100%
Convert the following fractions into percentages
A Decimal into Percentage and Vice Versa
Convert a decimal into percentage and vice versa
To change a percentage into a fraction or a decimal, divide it by 100%
Convert the following percentages into decimals