45
30/12 = x/18; 12x = 30 x 18; 12x = 540; x = 540 ÷ 12 = 45
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0.18 Gentry93: yeah but it also equals 0.05555555556%
5 1/6 31/6= 5 1/6 (thirty one over six equals five and one sixth)
3/7
4 over 5 4 over 5
nine over twelve.