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IrinaK [193]
3 years ago
6

What number is increased by 40% become 28?a.5 b. 10 c. 15 d. 20​

Mathematics
2 answers:
Delicious77 [7]3 years ago
7 0

Answer:

option d

Step-by-step explanation:

Let the number be x

40% of x = 0.40x

Increased by 40% = 28

That is ,

           x + 0.40x = 28

               1.40x = 28

                   x = \frac{28}{1.40}\\

                  x = \frac{28 \times 100}{1.40 \times  100 } = \frac{28 \times 100}{140} =\frac{4 \times 100}{20} = 4 \times 5 = 20

Therefore, the number is 20

kondaur [170]3 years ago
4 0

Answer:

d. 20

Step-by-step explanation:

28 ÷ (100%+40%)

= 28 ÷ 140%

= 28 ÷ 1.4 = 20

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