Question

The table shows the portion of some common materials that are recycled.

Material	Recycled
Paper	`5/11`
Aluminium cans	`5/8`
Glass	`2/5`
Scrap	`3/4`

Arrange the rate of recycling the materials from the greatest to the smallest.

Answer 1

Taking LCM of 11, 8, 5, 4 = 440

Now, `5/11 = 5/11 xx 40/40 = 200/440`

`5/8 = 5/8 xx 55/55 = 275/440`

`2/5 = 2/5 xx 88/88 = 176/440`

`3/4 = 3/4 xx 110/110 = 330/440`

As, `330/440 > 275/440 > 200/440 > 176/440`

i.e. `3/4 > 5/8 > 5/11 > 2/5`

That means, Scrap > Aluminium cans > Paper > Glass.