Find the percentage increase, when a number is changed from 6.25 to 7.50.

20 %

increase

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25 %

increase

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1.25 %

increase

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125 %

increase

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Solution

The correct option is A $20 %$ increase
Percentage increase $= \frac{7.5 - 6.25}{6.25} \times 100$

$= \frac{1.25}{6.25} \times 100$
$= 0.2 \times 100 = 20 %$

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A number 24000 is increased successively by 15% , 25 % and 20%. Find the overall increase in percentage.

(i) A number is increased from 125 to 150; find the percentage increase.
(ii) A number is decreased from 125 to 100; find the percentage decrease.

1998 - 1999

2000 - 2001

25

45

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