Hi, please help to solve this P5 question.
Tom has $420 more than Jerry at first. For every @2 Tom saves, Jerry saves $5. Find the amount of money Jerry has saved when Jerry and Tom have the same amount of money.
I know that the answer is to get the difference of 5-2=3. then take 420/3=140, followed by 140×5=700. Answer is $700. I’m not sure how this steps can be explained to my child. Especially, the part where 140×5….Please help.