Back to Use proportional relationships to solve multistep ratio and percent problems — Problem 2 · Task Set 5

7.RP.A.3 Tutor Intake -- Multistep Ratio and Percent Problems

This short check helps your tutor see where to start. Work each problem on
your own, without a calculator. If you are not sure, give your best try --
every answer helps your tutor plan your first few sessions.

Grade 7·11 problems·~12 min·Common Core Math - Grade 7·standard·7-rp-a-3

Work through problems with immediate feedback

Concepts

A price rises from $50 to $60. A student computes the percent
increase as $10/60 \approx 16.7\%$ . What did the student do
wrong?

The student divided by the new value (60) instead of the original value (50); percent change is always relative to the original.

The student should have used 10/50 x 100 but wrote the wrong numerator.

Nothing -- $10/60$ is correct because 60 is the more recent value.

The student needed to add 50 and 60 together first.