Question

12. Find:

a 60% of a quantity if 15% of the quantity is 45

b 72% of a quantity if 8% of the quantity is 64

c.86% of a quantity if 14% of the quantity is 420

d 12% of a quantity if 75% of the quantity is 250.​

Answer 1

Answer:

your first answer is 180

Answer 2

Answer:

a)180

b)576

c)2580

d)40

Step-by-step explanation:

a)

15% corresponds to 45

∴ 1% corresponds to = 45 ÷ 15 = 3

∴ 60% corresponds to = 3 x 60 =180

b)

8% corresponds to 64

∴ 1% corresponds to = 64 ÷ 8 = 8

∴ 72% corresponds to = 8 x 72 = 576

c)

14% corresponds to 420

∴ 1% corresponds to = 420 ÷ 14 = 30

∴ 86% corresponds to = 30 x 86 = 2580

d)

75% corresponds to 250

∴ 1% corresponds to = 250 ÷ 75 = 3.333333333333333

∴ 12% corresponds to = 3.333333333333333 x 12 = 40