What is the correct order of the following numbers from least to greater?

2/3, - 0.6, 0.65, 4/5

We can either convert them to decimals or to fractions

if decimals

2/3=0.66666666

4/5=8/10=0.8

so the order is

-0.6, 0.65, 0.66, 0.8 or

-0.6, 0.65, 2/3, 4/5

if conver to fractions then

since - 0.6 is negative, it is smallest, no need to convert

0.65=65 hundreths=65/100

2/3=66/99=prety close

4/5=8/10=80/100

order is

-0.6, 65/100, 66/99, 80/100 or

-0.6, 0.65, 2/3, 0.8

2/3 = 0.66

Now lets see ...

4/5 = 0.8

Answer: - 0.6, 0.65, 2/3, 4/5