Question

order from least to greatest: 2.1, 3/5, -0.7, 7/10

Answer 1

what do you think goes first

Answer 2

Change each one in to a decimal first

Answer 3

and once you do that you will have
2.1
0.6
-0.7
0.7

Answer 4

and them decimals from least to greatest are as followed:

-0.7, 0.6, 0.7, 2.1

Answer 5

Then you convert them into you final answer which is:

0.7, 3/5, 7/10, 2.1