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siniylev [52]
2 years ago
12

25% of z is 150. Find the value of z.

Mathematics
2 answers:
Nonamiya [84]2 years ago
4 0
The answer is 600
25 x 4 =100
150 x 4 = 600
checking work
.25 x 600= 150
BartSMP [9]2 years ago
3 0

Answer:

z = 600

Step-by-step explanation:

<u>Method 1 - ratios</u>

If 150 is 25% then z is 100%:

\begin{aligned} 150 : 25 & = z : 100\\\dfrac{150}{25} & = \dfrac{z}{100}\\150 \cdot 100 & = 25z\\15000 & = 25z\\z & = \dfrac{15000}{25}\\z & = 600 \end{aligned}

<u>Method 2</u>

Calculate the amount for 1%, then multiply by 100% to find z:

25% = 150

⇒ 1% = 150 ÷ 25 = 6

⇒ z = 100% = 6 x 100 = 600

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