Bonus
Have you finished early? Are you ready for an extra challenge?
Here is a bonus problem:
Bob would like to exchange US Dollars for Australian Dollars. He knows that 100 US Dollars is equivalent to 105 Australian Dollars. Find how many Australian Dollars are equivalent to 86 US Dollars.
Based on the numbers in the question, can you find the constant of proportionality?
Sometimes we use a certain style of mathematical working when we solve proportionality problems. It involves first establishing the general equation y=kx, then finding k. Notice that y=kx is a straight line through the origin.
Arrange the steps below in the correct order. You will see a tick when the steps are in the correct vertical order.
You need to open this Google Drawing Check your answer with the solution.