is this right?

to finde decimal and percent for 1 4/5
decimal is 1.8 percent 180%

Right.

i now need to change .003 to a fraction and a percent

i got :
3/100,000 for fraction
3% for percent
is this right?

No.

0.003 = 3/1000

0.03 = 0.3%

can you check these:

3/100 fraction
= 0.003 decimal
= .3%

3 5/10 fraction
= 3.5decimal
=350%

1/200 fraction
= 0.005 decimal
= .5%

5 4/100 fraction:
5.04 decimal
504%

34/10000 fraction :
.0034 decimal
0.34 %

3/100 = three hundredths = 0.03 = 3.0%

The others are correct.

No, the decimal and percent for 1 4/5 are slightly different than what you mentioned.

To convert a mixed number like 1 4/5 to a decimal, you need to add the whole number part to the fractional part.

Here's how you can do it:

1) Divide the numerator (4) by the denominator (5):
4 ÷ 5 = 0.8

2) Add the whole number part (1) to the decimal you obtained in the previous step:
1 + 0.8 = 1.8

Therefore, the decimal representation of 1 4/5 is 1.8.

To convert the decimal (1.8) to a percent, you can multiply it by 100 and add the percent sign:

1.8 * 100 = 180%

Hence, the correct decimal and percent for 1 4/5 are:
Decimal: 1.8
Percent: 180%