To Work Out Questions Like The First One That Reads : 3/10 Of 250, All You Have To Do Is Simply Divide 250 By The Denominator, Which Is 10 In This Case And The Multiply It By The Numerator (3). Answer ~ 250 Divided By 10 = 25 X 3 = 75 I Hope That Helps, And If You Are Stuck Of Any Other Types Of These Questions, Feel Free To Ask Me