Vans and bicycles are in the ratio 3:8. A learner says vans are 3/8 of all the vehicles. Which fraction corrects the learner's ratio-and-fraction error?

Explication

The two groups contribute 3 plus 8, or 11, equal parts to the whole, so vans are 3/11 of all vehicles. The learner's 3/8 uses the bicycle term as denominator and describes a part-to-part comparison instead.