If a used stethoscope costs $2.25, how many stethoscopes can Jill buy with $20.00?

This question can be solved by determining how many times $2.25 goes into $20: $20 \u00F7\u00A02.25 = 8.89 Jill cannot buy a fraction of a stethoscope, so the number must be rounded down. Jill can buy 8 stethoscopes for $20.00.