There are 4 triangles and 16 squares. what is the simplest ratio of triangles to square

I'll give brainliest if you answer right : )

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

Tom drove 206 miles in 3.9 hours. estimate his average speed.