Answer:

1. 39/100

2. 777/1000

3. 121212/1000000

4. 0.6250

5. 0.6667

Step-by-step explanation:

1. Step 1: Write down the decimal divided by 1 =

0.39

1

Step 2: Multiply both top and bottom by 100 (because there are 2 after the decimal point)

=

0.39

1

x

100

100

=

0.39 x 100

1 x 100

=

39

100

2.Explanation:

Step 1: Write down the decimal divided by 1 =

0.777

1

Step 2: Multiply both top and bottom by 1000 (because there are 3 after the decimal point)

=

0.777

1

x

1000

1000

=

0.777 x 1000

1 x 1000

=

777

1000

3.Step 1: Write down the decimal divided by 1 =

0.121212

1

Step 2: Multiply both top and bottom by 1000000 (because there are 6 after the decimal point)

=

0.121212

1

x

1000000

1000000

=

0.121212 x 1000000

1 x 1000000

=

121212

1000000

Simplify the fraction

=

121212 : 2

1000000 : 2

=

60606

500000

=

60606 : 2

500000 : 2

=

30303

250000

4.Multiply fraction to become

/100=

5

8

x

12.50

12.50

=

5 x 12.50

8 x 12.50

=

62.50

100

= 62.50 : 100 (if divided by 100 then decimal place move forward two step)

= 0.6250

5.Multiply fraction to become

100

=

2

3

x

33.33

33.33

=

2 x 33.33

3 x 33.33

=

66.67

100

= 66.67 : 100 (if divided by 100 then decimal place move forward two step)

= 0.6667