Explanation

30% of 50 is calculated by multiplying 50 by 30/100, which equals 15.

Explanation

The formula for simple interest is:

Simple Interest (SI) = (Principal x Rate x Time) / 100

Rearrange the formula to solve for Rate (R):

R = (SI / Principal) x (100 / Time)

Plug in the values:

R = (70 / 150) x (100 / 10)

R = 0.4667 x 10

R = 14/3

R = 4.67 (approximately)

So, the rate of interest is approximately 4.67% or 14/3%.

Explanation

To find 200% of 55, you can multiply 55 by 2 (since 200% is equivalent to 2 times 100%).

55 × 2 = 110

Explanation

= 25 % × 28

= (25/100) 2× 8

= (25 × 28) / 100

= 700 / 100

= 7

**

ND22-1-2023

Explanation

9 percent *215000 =

(9:100)*215000 =

(9*215000):100 =

1935000:100 = 19350

******

RY 31-12-2022

Explanation

Gain%=(100+common gain%)2100−100∴Gain %=[(100+10)2100−100]%=(12100−10000100)%=21%

Explanation

Explanation

C.P. (Cost Price) of each share = Rs. 25 + (2% of 25) = Rs. 25 + 0.50 = Rs. 25.50

And therefore, the Number of shares = Total amount / C.P. of each share = Rs. 12750 / Rs. 25.50 = 500

Explanation

1. Number of boys who passed:

$$32\mathrm{\%}\text{ of }450=\frac{32}{100}\times 450=144$$

A number of boys who failed:

$$450-144=306$$

2. Several girls who passed:

$$38\mathrm{\%}\text{ of }550=\frac{38}{100}\times 550=209$$

A number of girls who failed:

$$550 - 209 = 341$$

3. Total students who failed:

$$306 text{ (boys) } + 341 text{ (girls) } = 647$$

Explanation

1. 3 of 12 can be written as:
   312
2. To find percentage, we need to find an equivalent fraction with denominator 100. Multiply both numerator & denominator by 100
   
   312 × 100100
3. = (3 × 10012) × 1100 = 25100
4. Therefore, the answer is 25%