Answer:
11 stones.
Step-by-step explanation:
If 6 stones weigh 30 grams, then 1 stone would be 5 grams.
Fractions are fun so let's do this:
1 stone = x stones
5 grams 55 grams
To get 5 to 55, you multiply 11. So do that on the numerator, and bam, you got 11 stones.
