First change the 230 grams to kilograms or 1 kilogram to grams. The units have to be the same. Next set up a proportion. Cross multiply to solve the proportion.
1 kg = 1000g 230 g/30 biscuits = 1000g/x biscuits 230x = 30(1000) 230x = 30000 divide both sides by 230 x =130 biscuits
