Are these ratios 1:2 11:16 equivalent

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Glenda makes an online purchase for picture frames for $12.95 each and formats of $5.89 each the site says it taxes paid by the customer or 6.5% of the total purchase price shipping charges are based on the