Answer :
The answer is 14/5
You add 9/10 and 9/10=18/10. Then you divide 18 by 10 which is 1 8/10 and you reduce it to 1 and 4/5
You add 9/10 and 9/10=18/10. Then you divide 18 by 10 which is 1 8/10 and you reduce it to 1 and 4/5