!
Multipliers
Video239onwww.corbettmaths.com
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
Clickhere
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
Examples
Workout
Question1: Writedownthemultipliersthatareequivalenttothefollowingpercentages
(a) 50%
(e) 45%
(f)95%(g)5%(h)3%
(b)80%(c)10%
(d)25%
(i)7%(j)36%(k)71%(l)44%
(m)0%(n)175%(o)104%(p)160%
(q)7.5%
(r)1.2%
(s)0.8%
(t)0.01%
Question2: Workout
(a) 20%of90cm
(b)70%of3km(c)15%of$4500 (d)57%of£58650 (e)3.9%of40cm (f)106%of8km
Question3: Writedownthemultipliersthatareusedtocalculatea:
(a)4%increase
(b)15%increase
(c)30%increase
(d)62%increase
(e)29%increase
(f)70%increase
(g)1%increase
(h)100%increase
(i)150%increase (j)108%increase (k)220%increase (l)584%increase
(m)1.5%increase (n)2.8%increase (o)0.3%increase (p)0.09%increase
Question4: Workouteachofthefollowing
(a) 60mlincreasedby70%(b)£940increasedby8%(c)143gincreasedby19%
(d)405increasedby8.3% (e)1150increasedby131%(f)9kgincreasedby0.05%
© CORBETTMATHS 2017
!
Multipliers
Video239onwww.corbettmaths.com
Question5: Writedownthemultipliersthatareusedtocalculatea:
(a)2%decrease
(b)8%decrease
(c)12%decrease (d)15%decrease
(e)30%decrease (f)60%decrease (g)72%decrease (h)23%decrease
(i)100%decrease (j)1.6%decrease (k)2.9%decrease (l)11.5%decrease
(m)0.6%decrease (n)0.9%decrease (o)0.38%decrease (p)0.08%decrease
Question6: Workouteachofthefollowing
(a) 80mldecreasedby4%(b)£480decreasedby13%(c)143gdecreasedby40%
(d)308decreasedby1.2%(e)2250decreasedby0.5%(f)9kgdecreasedby6.03%
Apply
Question1: 250studentsattendaprimaryschool.
94%ofthestudentsgoonavisittothezoo.
Howmanystudentswenttothezoo?
Question2: Acarsalesmanreceives3%commissiononhistotalweeklysales.
Lastweekhistotalsaleswere£28500
Howmuchcommissiondoesheearn?
Question3: 9400peopleattendarugbymatchbetweenBristolandBath.
77%ofthefansaremale.
Howmanyfemalesattendthematch?
Question4: Overthepast10years,thepopulationofanislandhasdecreasedby2%
Thepopulationofanisland10yearsagowas240000
Whatisthepopulationoftheislandnow?
Question5: Lilyspends£60amonthonelectricity.
Bychangingcompany,Lilycansave17%
HowmuchwouldLilypayeachmonth?
© CORBETTMATHS 2017
!
Multipliers
Video239onwww.corbettmaths.com
Question6: David’ssalaryusedtobe£19,500beforehereceiveda8%payrise.
WorkouthowmuchDavidisnowpaid?
Question7: Anemptysandpitweighs6kg.
Theweightofthesandpitincreasesto50kgwhen\illedwithsand.
Adifferentsandpitis14%heavierbutholds22%lesssand.
Calculatetheweightofthissandpitwhenitisfullofsand.
Question8: Ashopdecreasesallitspricesby10%.
Aweeklatertheshopincreasesallpricesby10%.
Whatistheoverallchange?
Question9:
Chloeisgivena10%payrise.
ThenextyearChloeisgivenanother10%payrise.
HermanagersaysthatChloe’spayhasincreasedby20%overall.
ExplainwhyChloe’smanageriswrong.
Question10: Gordonisbuildingawardrobe.
Thewoodcosts30%morethanhehadestimated.
Heneeds40%morethanhehadestimated.
Howmuchmorethanhisoriginalestimatedoesthematerialforthewardrobe
cost?
Answers
© CORBETTMATHS 2017
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
Clickhere