6/4 + 0.68

Jason solved this problem by changing 6/4 to 1.2. He then added 1.2 to 0.68 and got 1.88.

This answer is incorrect. What did he do wrong?

Group of answer choices

6/4 should have been changed to 1.24

6/4 should have been changed to 1.5

1.2 + 0.68 should have equaled 0.80

1.2 + 0.68 should have equaled 8.0