Find:
(a) $15 \%$ of $250$
(b).$1 \%$ of $1$ hour
(c) $20 \%$ of $Rs.\ 2500$
(d) $75 \%$ of $1\ kg$

AcademicMathematicsNCERTClass 7

To do: To find:

(a) $15 \%$ of $250$

(b).$1 \%$ of $1$ hour

(c) $20 \%$ of $Rs.\ 2500$

(d) $75 \%$ of $1\ kg$


Solution:

$(a).\ 15$ % of $250$

$=\frac{15}{100}\times250$

$=15\times2.5=37.5$

$(b).\ 1$ % of $1\ hours$

$=1$ % of $60\ minutes$

$=1$ % of $(60\times 60)\ seconds$

$=\frac{1}{100}\times60\times60$

$=6\times6=36$

$(c).\ 20$ % of $Rs.\ 2500$

$=\frac{20}{100}\times2500$

$=20\times25$

$=Rs.\ 500$

$(d).\ 75$ % of $1\ kg$

$=75$ % of $1000\ g$

$=\frac{75}{100}\times1000$

$=750g=0.750\ kg$
raja
Updated on 10-Oct-2022 13:35:14

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