Question

9. Express the first quantity as a percentage of the second. (1) 15, 45 (ii) 35 min, 2 hours (iii) 540 g, 3 kg​

Answer 1

Answer:

Holla

Step-by-step explanation:

48 seconds, 5 minutes

=5∗6048×100%

=16%

b) 63 cents, 9 dollers

1 doller=100 cents

9 dollers=900 cents

Ans =90063×100%

=7%

c) 7mm, 2cm

1 cm=10 mm

2 cm=20 mm

Ans =207×100%

=35%

d) 24 min, 10 hours

1 hour= 60 min

10 hour= 600 min

Ans =60024×100%

=4%.

Answer 2

Step-by-step explanation:

(1) 15, 45

=> x% of 45 is 15

=> x/100 × 45 = 15

=> x/100 = 1/3

=> x = 33.33 %

(2) 35min, 2hours

1hr= 60min so, 2hrs= 120min

=> x% of 120min is 35min

=> x/100 × 120 = 35

=> x/100 = 7/24

=> x = 29.16 %

(3) 540g , 3kg

3kg=> 3×1000= 3000g

=> x% of 3000g is 540g

=> x/100 × 3000 = 540

=> x/100 = 540/3000

=> x = 18 %