Question

When the price of sugar increased by 10% the sale decreased by 10%. How much
difference was there in the amount of sale?
(1) 1% less (2) 1% more (3) There was no difference (4) 10% more​

Answer 1

Answer:

3) There was no difference

Answer 2

Answer:

1

Step-by-step explanation:

t,total amount of sale = price,p × sales,s

t=p*s

price increased by 10%

p1 = p×(1+10%)=p(1+0.1) = 1.1p

sales decreased by 10%

s1= s×(1-10%) = s(1-0.1) = 0.9s

t1 = s1 * p1

= 1.1p * 0.9 s =0.99ps =0.99t

%decreased from t to t1

= t1-t/t ×100

=0.99t -t/t ×100

= 0.01t/t ×100

=1%

1% of amount of sales decreased