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Comparing Quantities — MATHS STD 7 — Question

Gujarat BoardEnglish MediumSTD 7MATHSComparing Quantities2 Marks
Question
Find percentage of increase or decrease.
(i) Price of shirt decreased from ₹ 280 to ₹ 210.
(ii) Marks in a test increased from 20 to 30.
✓

Answer

(i) Decreased price of shirt $=$ ₹ $(280-210)$
$=$ ₹ $70$
$\therefore$ Percentage of decrease
$ \begin{array}{l} =\left(\frac{\text { Amount of change }}{\text { Original amount }} \times 100\right) \% \\ =\left(\frac{70}{280} \times 100\right) \%=25 \% \end{array}$
(ii) Increased marks $=30-20=10$
$\therefore$ Percentage of increase
$\begin{array}{l}=\left(\frac{\text { Increased marks }}{\text { Original marks or Initial marks }} \times 100\right) \% \\ =\left(\frac{10}{20} \times 100\right) \%=50 \%\end{array}$

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