Percentage | Maths

• Percentage is per-cent means parts per hundred(1/100)
• x/100 means x%
• To convert percentage into fraction then divide it  by 100.
• x%= x/100

Questions

1.If 70% of the students in a school are girls and the number of boys is 453. Find the number of girls? (Fireman Driver NCA 2020)
30% of students will be boys
30/100 * X = 453
X= 1510
Girls =1510- 453 = 1057

2018
1.If we add 20 with 20% of a number we get the same number. Which is that number ? (Caretaker Male 2018)
20+(20/100)n=n

2000+20n=100n 80n=2000 n=25

2.The fractional form of 1/2 of 1% is

(Beat Forest Officer 2018)
½*(1/100)=1/200

3.ഏത് സംഖ്യയുടെ 15% ആണ് 900 ? (WOMEN POLICE CONSTABLE NCA 2018)
N x 15/100 = 900
N=90000/15= 6000

4.1250 ന്റെ 50% ന്റെ 40% എത്ര? (Security Guard- Government Secretariat 2018)
1250 x (50/100) x(40/100) 250

5.Find 25% of 25% (Caretaker Male 2018)
(25/100) x (25/100) = 625/10000= 0.0625

6.743 + 958 = ? % of 5670 (Caretaker Male 2018)
1701=(x/100) * 5670 x=30


7.180 ന്റെ 2% എന്നത് ഏത് സംഖ്യയുടെ 3% ആണ്. (STORE KEEPER-KSFDC 2018)
180 x 2/100= X x 3/100 X=180 x 2 /3 = 120

8.If 20% of a number is 140, then 16% of that number is _____ (Junior Assistant KSFE /KSEB/KSRTC 2018)
(20/100) * x= 140 x=700 (16/100) * 700 = 112

9.10 പൈസ 10 രൂപയുടെ എത്ര ശതമാനമാണ്
(LGS Exserviceman-NCC 2018)
[(10/100)/10 ]* 100= 1%

10.ഒരു സംഖ്യയുടെ 50% = 100 എങ്കിൽ സംഖ്യയേത്
(LGS Exserviceman-NCC 2018)
X * (50/100)=100
X =100* 100/50= 200

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