Answer:
a) John spent 750$ so the ratio is 500:750 =2:3
b) John spent 900$ so the ratio is 600:900= 2:3
c) peter spent 800$ and John spent 1200$ so the ratio is 2:3
d) both spent 500$ and the ratio is 200:300 =2:3
Hope this helps!!!
this is maths not history