Question

WHAT PERCENT OF 1 3/4 HOURS IS 420 SECONDS?

Answer 1

your answer is 63/100%

Answer 2

Answer:

6.6 percent of $1\frac{3}{4}$ hours is 420 seconds.            

Step-by-step explanation:

To find : What percent of $1\frac{3}{4}$ hours is 420 seconds.

Solution :

Let x be the percent.

First we convert hours into second,

$1\frac{3}{4}=\frac{7}{4}$ hours

1 hour = 3600 seconds

$\frac{7}{4}hr=3600\times \frac{7}{4}s$

$\frac{7}{4}hr=6300s$

According to question,

$x\% \text{ of }6300=420$

$\frac{x}{100}\times 6300=420$                

$x=\frac{420\times 100}{6300}$  

$x=6.6$    

Therefore, 6.6 percent of $1\frac{3}{4}$ hours is 420 seconds.