1 a) ( 75/100) (40/100) = (3/4) X (4/10) = 3/10 30% of the girls wear glasses in class. b) 30% -> 12 100% -> (100/30) X 12 = 40 40 students in class
2. 86% -> 215 100% -> (100/86) X 215 = 250 No of workers is 250
3. Let c be the selling price before GST and discount. i) Amount to pay = (104/100) X (90/100) X c ii) Amount to pay = (90/100) X (104/100) X c the amount is the same for both options
4. If x is the original number, the new number is (125/100)(75/100) x = 0.9375 x Hence the new number is smaller than the original number.
a) 35% -> 70 100% -> (100/35) X 70 = 200 the number is 200
b) (80/100)(130/100) X 500 = 520 c) [(100-x)/100 ] (125/1000 = 1 (100 – x) 125 = 100 X 100 x = 20
5. a) ( 7 / 8) X 100 = 87.5% b) (14 / 25) X 100 = 56% c) 0.385 X 100 = 38.5% d) 0.112 X 100 = 11.2%
7. a) (12 1/5) / 100 = 0.122 b) ( 27 3/8) /100 = 0.27375
Ignore Q 8
9. a) 45 % -> 72 100% -> (72/45) X 100 = 160 b) 55% of 160 = (55/100) X 160 = 88
THE END!~ SimplyMi ^^
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