wordproblem

Question

Marilyn carries a tip-calculator card with her.It lists the amounts for 15% and 20% tips on whole-dollar vales up to $100.00.Her daughter notices a pattern. She says, "For each dollar the cost increases, the tips inthe 15% column increase by $.15." Explain why this pattern occurs for 15% column increase by $.15.

Answer 1

15% of $1 is 15 cents ($0.15), so for $2 15% is 30 cents ($0.30). For X dollars the calculator will show 15X cents in dollars and cents. If X is $35, for example, the calculator will show 525 cents as $5.25. (For 20% the same number of dollars will show as 700 cents or $7.)