2774.What percentage of numbers from 1 to 70 have 1 or 9 in the units digit?
1
14
20
21
Explanation:
Clearly, the numbers which have 1 or 9 in the units digit, have squares that end in the digit 1.
Such numbers from 1 to 70 are 1, 9, 11, 19, 21, 29, 31, 39, 41, 49, 51, 59, 61, 69.
Number of such number =14
$\therefore$ Required percentage =$ \left(\dfrac{14}{70} \times 100\right) $% = 20%.
2775.Gauri went to the stationers and bought things worth Rs. 25, out of which 30 paise went on sales tax on taxable purchases. If the tax rate was 6%, then what was the cost of the tax free items?
Rs. 15
Rs. 15.70
Rs. 19.70
Rs. 20
Explanation:
Let the amount taxable purchases be Rs. $ x $.
Then, 6% of $ x $ =$ \dfrac{30}{100} $
$\Rightarrow x $ =$ \left(\dfrac{30}{100} \times\dfrac{100}{6} \right) $ = 5.
$\therefore$ Cost of tax free items = Rs. [25 - (5 + 0.30)] = Rs. 19.70
2777.What percent of a day is 6 hours?
6.25%
20%
25%
12.5%
Explanation:
Total hours in a day = 24
Required percent $=\dfrac{6}{24}×100=25%$
44321.What is the percentage of $\dfrac{5}{10}$?
50%
45%
80%
20%
Explanation:
= $\dfrac{5}{10} \times 100$
=50%
= $\dfrac{5}{10} \times 100$
=50%
44322.The average attendance at a local high schools football games went down from 2000 people in 2003 to 1500 people in 2004. What was the percent decrease in attendance at the football games?
50%
45%
25%
20%
Explanation:
The absolute value change = New Value − Actual Value
= 2000-1500 = 500
Percentage change = $\dfrac{Absolute value change}{Actual Value } \times 100 $
= $\dfrac{500}{2000} \times 100 $
= 25%
The absolute value change = New Value − Actual Value
= 2000-1500 = 500
Percentage change = $\dfrac{Absolute value change}{Actual Value } \times 100 $
= $\dfrac{500}{2000} \times 100 $
= 25%
44323.Two successive price increases of 10% and 10% of an article are equivalent to a single price increase of
19%
20%
21%
22%
Explanation:
here , x=10 and y=10
Successive Percentage Change = (x + y + $\dfrac{xy}{100}) %$
Successive Percentage Change = (10 + 10 + $\dfrac{10 \times 10}{100}) %$
= 21%
here , x=10 and y=10
Successive Percentage Change = (x + y + $\dfrac{xy}{100}) %$
Successive Percentage Change = (10 + 10 + $\dfrac{10 \times 10}{100}) %$
= 21%
44324.When the price of article was reduced by 20% its sale increased by 80%. What was the net effect on the revenue?
44% increase
44% decrease
66% increase
75% increase
Explanation:
here, x=80 and y=20
Successive Percentage Change = (x - y - $\dfrac{xy}{100}) %$
= (80 - 20 - $\dfrac{80 \times 20}{100}) %$
= 44%
here, x=80 and y=20
Successive Percentage Change = (x - y - $\dfrac{xy}{100}) %$
= (80 - 20 - $\dfrac{80 \times 20}{100}) %$
= 44%
44325.we have to increase a value 120 by 20%. What will be the final value?
165
240
144
310
Explanation:
Final Value= Initial Value + 20% of Initial Value
= 120 + 20% of 120
=120 (1+ 20%)
=120(1+20/100)
=120(1+0.2)
=120 x 1.2=144
Final Value= Initial Value + 20% of Initial Value
= 120 + 20% of 120
=120 (1+ 20%)
=120(1+20/100)
=120(1+0.2)
=120 x 1.2=144
44326.we decrease 120 by 10%. What will be the final value?
98
108
245
198
Explanation:
Final Value= Initial Value - 10% of Initial Value
= 120 - 10% of 120
=120 (1 - 10%)
=120(1-10/100)
=120(1- 0.1)
=120 x 0.9=108
Final Value= Initial Value - 10% of Initial Value
= 120 - 10% of 120
=120 (1 - 10%)
=120(1-10/100)
=120(1- 0.1)
=120 x 0.9=108
44327.Express the given ratios into percent
4 : 5
4 : 5
40%
45%
95%
80%
Explanation:
4 : 5 = 4/5 = (4/5 × 100) % = 80 %
4 : 5 = 4/5 = (4/5 × 100) % = 80 %
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