Is 2.58, 2.6,2 5/8,2 2/3 in order from least to greatest

Yes it is.

2.58, 2.6, 2 5/8 can be converted into 2.625, and 2 2/3 can be converted into 2.66 repeating.

2.58, 2.6, 2.625, 2.66 for a recap.

I would first turn them all into decimals

2.58, 2.6, 2.625, 2.666

How I turned 2 5/8 and 2 2/3 into decimals: divide numerator by denominator to get the decimal. Then keep the whole number.

5/8 =.625

2/3 =.666

Answer is 2.58, 2.6, 2 5/8, 2 2/3