Question

An octopus weighed 5 6 kilograms. After two weeks, its weight was increased by 3 10 kilograms. But afterward, it lost 1 5 kilograms in weight as it was sick. What is its current weight?

Answer 1

The current weight of the octopus is:

`w = (14)/(15)\,kg`

Explanation:

The current weight is determine by addition and subtraction of rational numbers:

`w = (5)/(6)\,kg + (3)/(10)\,kg -(1)/(5)\,kg`

`w = (50 + 18)/(60)\,kg - (1)/(5)\,kg`

`w = (68)/(60)\,kg - (1)/(5) \,kg`

`w = (17)/(15)\,kg - (1)/(5)\,kg`

`w = (85-15)/(75) \,kg`

`w = (70)/(75)\,kg`

The current weight of the octopus is:

`w = (14)/(15)\,kg`