Help me ;-; its due today

225/100 of last years cost. write each fraction as a decimal and as a percent

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.