Fern is helping her mother make decorations for a family gathering. Fern is putting lace around napkins. For each napkin, she needs 3/5 yard of lace. Fern will put the lace on 10 napkins. Use a number model to show the problem. Write an equation to match the model and use the letter Y to represent the amount of lace she will need. How many yards of lace will Fern need?