Question

What is 30% of 70?? please help

Answer 1

Answer:

21

Step-by-step explanation:

Method 1:

$p\%=\dfrac{p}{100}\\\\30\%=\dfrac{30}{100}=\dfrac{3}{10}=0.3\\\\30\%\ of\ 70\ is\\\\0.3\cdot70=21$

Method 2:

$\begin{array}{cccc}100\%&-&70&\text{divide both sides by 10}\\\\10\%&-&7&\text{multiply both sides by 3}\\\\30\%&-&21\end{array}$