Mala buys 6 packs of sugarwith the mass of 300 gram per pack . She needs 2500 gram of sugar to make a cake .Does Mala have enough sugar for her cake?
No, she doesn't. She needs:
2,500/300 =8 1/3 packs of sugar.
8 1/3 - 6 = 2 1/3 packs of sugar she has to buy.