Question

A is 20% more than b. B is 20% less than c. C is 30% more than d. A is what percent of d?

Answer 1

Answer:

1.248

Step-by-step explanation:

Given

a = b + (20/100) * b

a = 1.2 * b

And

b = c - (20/100) * c

b = 0.8 * c

And

c = d + (30/100) * d

c = 1.3 * d

Now

a = 1.2 * b

a = 1.2 * 0.8 * c

a = 1.2 * 0.8 * 1.3 *d

a = 1.248 * d

a = (124.8/100) * d

Therefore a is 124.8% of d

i.e. a is 24.8% more than d

Hope it Helps

Answer 2

Step-by-step explanation:

Answered 3 years ago

A is 30% more than B.

So, A = B + 30% of B = B + 30/100 *B = B + 3/10 *B = 13/10 *B

B is 60% less than C.

So, B = C - 60% of C = C - 60/100 *C = C - 3/5 *C = 2/5 *C

So, A = (13/10)*(2/5)*C = 13/25 *C.

So, we get C > A.

The difference: C - A = C - 13/25 *C = 12/25 *C

Hence, the percentage by which A is less than C = (C-A)/C *100 = 12/25 *100 = 48%.