If p is 2% of k. What is 50% of k intems of P and k and if 10% of a number is 7. What is 80% of the number?

a.p/100

b.56

Step-by-step explanation:

2% of p=k

2/100 ×p=k

2p/100=k

Cross multiply 2p=100k

P=100k/2

p=50k

Let's make k the subject of formula

k=p/50

So 50% of k in terms of p

50/100×k

And k=p/50

So let's substitute

50/100×p/50

P/100

Therefore 50%of k=p/100

Let the unknown number be x

10% of x is 7

10/100×x=7

10x/100=7

Cross multiply

10x=(100)(7)

10x=700

Divide both sides by 10

X=70

So 80% of 70

80/100×70

5600/100

=56

Therefore 80% of 70=56