How do you turn a decimal to a fraction

Say you have 0.8. The fraction would be 8/10. So if its the tents place the denominator is 10. hundreths would be 100 as a denominator. Last digit numerator. Was this helpful

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐