Answer:
Its the third option, Mark is wrong, 2/5 converts to .4 which means the anser is 2.4
Step-by-step explanation:
2/5 when divided in a calculator or by mental maths is .4. Since 2 is in front of it, we put it together, giving us 2.4. Mark's answer is 2.25, so he is wrong. Hope this helped :)
