Fractions, Percentages and Decimals

Denominator

the number of equal parts into which the whole is divided in order to obtain fractional parts. For example, if a line segment is divided into 3 equal parts, each of those parts is one-third of the whole and corresponds to the unit fraction 1/3.

Numerator

the top number of a fraction, showing how many parts we have

1/10 as a percentage

10%

1 as a percentage

100%

1/5 as a percentage

20%

1/4 as a percentage

25%

1/2 as a percentage

50%

3/4 as a percentage

75%

LCD

Lowest Common Denominator

Thousandth

One out of 1,000 parts of a whole

Tenth

One out of 10 parts of a whole

Hundredth

One out of 100 parts of a whole

Tenths

The first place value after a decimal point.

Thousandths

The place to the right of hundredths

Hundredths

The place to the right of tenths

Percentage

a fraction whose denominator is 100

Proper fractions

a fraction whose numerator is smaller than the denominator

Improper fractions

a fraction with its numerator equal to or greater than its denominator

Mixed numbers

a number that is made up of a whole number and a fraction

Decimal numbers

a numeral in the decimal number system. For example, the decimal expansion of 63/4 is 6.75. The integer part is 6 and the fractional part is 0.75.

Equivalent fractions

alternative ways of writing the same fraction. For example, 1/2=2/4=3/6