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# maths

### percentages

the value of a painting increase by 12% to £1680 . what was the original price of the painting 112%=£1680 / 1% then / 112 from £1680 = 1% then that= 150 * 100 100% what +£1500
find 7% of 80 7 /100 * 80 = 5.6
find 12% of 90 12 / 100 * 90 = 10.8
increase 300 by 10% 330
decrease 500 by 20 % 400
increase 72 by 20 86.4
decrease 200 by 30 140
Naomi buys a top hat that been reduced in the sale by 35% if the sale price is £ 13.00 what was the original price 100-35 =65 13.00 / 65 =0.2 0.2 * 100= £20
nicola increase the price of the bookcase by 26% if the bookcase is now price at £ 819 what was the original price 100+26 = 126 819/126 =6.5 6.5 * 100= 650
10% of 50 = 5%
1% of 200 =2 %
50 % of 190 =95%
25% of 800 = 200%
17% of 800 = 13.5 %
3% of 250 = 7.5 %
0.5% of 700 = 3.5
compound interest
josh put's £ 3000 into a bank he gets 7 .2% interest per year how much does josh have after 5 years 100% + 7.2 =107.2 107.5 / 100= 1.072 ( 1.072)5
nicola puts £ 200 in a bank account with interest of 10 % per year how much does nicola have after 3 years 100%+10= 110 110 / 100= 1.1 1.13 =1.331 200* 1.331= 266.2
multipliers
increase by 12 % 100+12 = 112 112/100 =1.12
decrease by 40% 100 - 40 = 60 60/100 =0.6
12% of an amount 0.12
increasing by 17.5 % 1.175
increasing by 7% 1.07
find 33% of an amount 0.33
decreasing by 13 % 0.87
decreasing by 12.6 0.814
increasing by 5.3 % 1.053
decreasing by 0.2 % 99.8
finding 16 of an amount 0.16
increasing by 0.05% 1.0005
decreasing by 97% 0.03
increasing by 120 % 2.2
A gym has 275 members 40% are bronze members 28% are silver members The rest are gold members Work out how many members is equal to 40% - 40/100 times 275, do the same for 28%. Add the 2 together and take away from 275 to give you the answer. 88
Created by: coco_coco123