Question

Mr Kai had some packets of salt. He sold 5/6 of the packets of salt and had 15 packets left. How many packets of salt did Mr Kai have at first?​

Answer 1

90

Explanation:

`(1)/(6)+(5)/(6)`

in here
`(1)/(6)= 15\\ \\so\\\\(5)/(6) =75\\\\(1)/(6) +(5)/(6)=(6)/(6) \\`

in this case it is 15+75=90