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

Answer:

The current weight of the octopus is:

$w = \frac{14}{15}\,kg$

Step-by-step explanation:

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

$w = \frac{5}{6}\,kg + \frac{3}{10}\,kg -\frac{1}{5}\,kg$

$w = \frac{50 + 18}{60}\,kg - \frac{1}{5}\,kg$

$w = \frac{68}{60}\,kg - \frac{1}{5} \,kg$

$w = \frac{17}{15}\,kg - \frac{1}{5}\,kg$

$w = \frac{85-15}{75} \,kg$

$w = \frac{70}{75}\,kg$

The current weight of the octopus is:

$w = \frac{14}{15}\,kg$