Question

ACTIVITY SET C:
Find the base of the following:
1) 5% of N is 28
2) 18 is 90% of N
3) 75% of N is Php750
4) 60 is 2% of what number?
5) 98% of what number is 245?​

Answer 1

Answer:

560

Step-by-step explanation:

5% X x=28

5/100X 5=28

28X100/5

28X20=560

560

Answer 2

Step-by-step explanation:

1.

$5\% \times N = 28 \\ \frac{5}{100} \times N = 28 \\ \frac{1}{20} N = 28 \\ N = 28 \times 20 \\ N = 560$

2.

$18 = 90\% \times N \\ 18 = \frac{90}{100 } \times N \\ 18 = \frac{9}{10} N \\ 18 \times 10 = 9N \\ \frac{180}{9} = N \\ 20 = N$

3.

$75\% \times N = 750 \\ \frac{75}{100} N = 750 \\ \frac{3}{4} N = 750 \\ 3N = 750 \times 4 \\ N = \frac{3000}{3} \\ N = 1000$

4.

$60 = 2\% \times N \\ 60 = \frac{2}{100} \times N \\ 60 = \frac{1}{50} N \\ 60 \times 50 = N \\ 3000 = N$

5.

$98\% \times N = 245 \\ \frac{98}{100} \times N = 245 \\ \frac{49}{50} N = 245 \\ 49N = 245 \times 50 \\ N = \frac{12250}{49} \\ N = 250$