My Math Forum PERCENTAGE SHORTCUT

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April 6th, 2012, 06:23 PM   #1
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PERCENTAGE SHORTCUT

Hi

i have few problems in percentage [color=#FF4000]i can solve these problem but in long method[/color]. I would appreciate if anyone can [color=#FF0000]help me to solve these below mentioned questions with any trick or short way[/color].

Q1. (43% of 2750) – ( 38% of 2990 ) = ?

Option – (a) 43.6 (b) 46.3 (c) 44.7 (d) 49.3 (e) None of These

Q2. (9% of 386) * (6.5% of 144) = ?

Option – (a) 328.0065 (b) 333.3333 (c) 325.1664 (d) 340.1664 (e) None of These

Q3. 12% of 980 - ?% of 450 = 30% of 227

Option – (a) 14 (b) 17 (c) 11 (d) 8 (e) None of These

Q4. ? % of 8745 = 5159.55

Option – (a) 47 (b) 49 (c) 54 (d) 57 (e) None of These

Q5. 53% of 120 + 25 % of 862 = ? % of 500

Option – (a) 42.50 (b) 55.82 (c) 38.89 (d) 63.68 (e) None of These

Q6. (180 % of ? ) / 2 = 504

Option – (a) 400 (b) 480 (c) 560 (d) 600 (e) None of These

Q7. (0.08% of 363 + 0.6% of 241 ) * 500 = ?

Option – (a) 84.62 (b) 86.82 (c) 846.2 (d) 868.2 (e) None of These

Q8. (31% of 260) * ? = 12896

Option – (a) 140 (b) 150 (c) 160 (d) 180 (e) None of These

Regards
Santosh
Attached Files
 Percentage.doc (20.5 KB, 188 views)

 April 6th, 2012, 06:42 PM #2 Senior Member     Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,155 Thanks: 463 Math Focus: Calculus/ODEs Re: PERCENTAGE SHORTCUT I don't know what method you are using, but I would simply get out my calculator, convert the percentages to decimals and perform the indicated operations: Q1. $.43\cdot2750-.38\cdot2990=46.3$ Q2. $$$.09\cdot386$$$$.065\cdot144$$=325.1664$ Q3. $.12\cdot980-\frac{x}{100}\cdot450=.3\cdot227$ $117.6-\frac{9}{2}x=68.1$ $49.5=4.5x$ $x=11$ Q4. $\frac{x}{100}\cdot8745=5159.55$ $x=5159.55\cdot\frac{100}{8745}=59$ Q5. $.53\cdot120+.25\cdot862=\frac{x}{100}\cdot500$ $63.6+215.5=5x$ $5x=279.1$ $x=55.82$ Q6. $\frac{1.8x}{2}=504$ $1.8x=1008$ $x=560$ Q7. $$$.0008\cdot363+.006\cdot241$$500=868.2$ Q8. $.31\cdot260x=12896$ $80.6x=12896$ $x=160$
 April 6th, 2012, 06:52 PM #3 Newbie   Joined: Apr 2012 Posts: 2 Thanks: 0 Re: PERCENTAGE SHORTCUT Hi, thanks for reply, actually i am preparing for an exam for MBA exam for this i am trying to findout the easiest way to solve these reply. In this exam i cannot you calculator. I can resolve this problem but with long method but i want to resolve these question with any tricks or shortcut method like Digital root or Last Digit checks etc.. Thnks

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# find the value of: 12% of 980-?% of 450=30% of 227

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