°~ calculate the percentage ~ °with t_t operations

maicera, who sells newspapers, earns 20% commission for each subscription she sells. if in a month you sold subscriptions worth $ 780, how much do i earn

aria buys a bicycle worth $ 350.00, for which he leaves 15% of the section. how much money would he put away his bicycle?

marino takes 6 hours to sleep on monday. what percentage of the day do you sleep? he slept 20% more on tuesday, how much did he sleep on tuesday?

the number of subscriptions of the community magazine went from 500 to 1500, what percentage does 1500 represent from 500?

gabrieles studies a graduate degree at her state university. he paid $ 35.00 on monday for his meal at his faculty cafeteria. on tuesday i spend 10% more, because i have two servings of fruit, and on wednesday he did not eat his soup so he gave 20% less than on tuesday. how much did the meal cost you on wednesday