Question

After deduction
of 15 from a no. ita remains only 80%, what is the 40% of that no.?
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Answer 1

Answer is 30

n- 15 = 0.8n

0.2 n =:15

0.4n =30

Answer 2

Step-by-step explanation:

let's take no.of items be x

x-15 =80/100×x

x-80x/100=15

100x-80x/100=15

20x/100=15

x/5=15

x=75

then no.of items are 75

40% of 75 items are

40/100×75

2/5×75

=30

then 40% of 75 items are 30