How can you write 0.45 as fraction and a percentage , show work

To convert 0.45 to percent multiply by 100

0.45 × 100 = 45 %

Write the decimal number as a fraction
(over 1)
0.45 = 0.45 / 1

Multiplying by 1 to eliminate 2 decimal places
we multiply top and bottom by 2 10's

Numerator (N)
N = 0.45 × 10 × 10 = 45
Denominator (D)
D = 1 × 10 × 10 = 100

N / D = 45 / 100

Simplifying our fraction

= 45/100

= 9/20

0.45

This is called 45 hundredths, so write 45 as a fraction over 100.

45/100

Simplify:

9/20

Multiply by 100:

0.45 * 100 = 45%