Oranges are bought at 7 for Rs.6

Oranges are bought at 7 for Rs.6. At what rate per hundred must they be sold to gain 33%?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #4816