Question

7. If we decrease the length and the breadth of a rectangle by half, by how much will the
area of the rectangle change?​

Answer 1

So area of rectangle=l×b

now half of length and breadth=1/2 and b/2

Now area=l/2×b/2=lb/4

So change in areaof rectangle=

$lb - lb \div 4 \\ 4lb - lb \div 4 \\ 3lb \div 4$

=3/4×lb