Remark
The population that is middle class is (4/5) * 2000 * 4/5 = 8000/5 = 1600
The others are 2000 - 1600 = 400 which should be 1/5 of the population.
these sign is used to tell weather the number is greater or less than the number < or > but this sign means its equal =
hope this you and
step-by-step explanation: