A green grocer received a boxful of tomatoes and on opening the box found that several had gone bad. He then counted them up so that he could make a formal complaint and found that 68 were mouldy, which was 16 per cent of the total contents of the box. How many tomatoes were in the box?  Choose the correct choice from the following:
A) 336 B) 425 C) 275 D) 235 E) 689

Rationale: b 425 ( 68 ã · 16 ) ã — 100
Answer: B