30 percent
Just divide thirty by ten to get three, and there you have it; three pounds is ten percent of thirty. This is proven by multiplying three by ten to get thirty.
Ten percent of thirty is three.
_73__ 10000 (Seventy three over ten thousand)
90%
30,000
300
10%
66.6666667%
70%
0.5
30%
7/(10*10) = 7%