A typical human adult weighs 150 pounds, while a human newborn weighs approximately 7 pounds. An adu

A typical human adult weighs 150 pounds, while a human newborn weighs approximately 7 pounds. An adult female Western Grey Kangaroo weighs about 30 kilograms and gives birth to babies who are approximately one gram. If human babies were proportionally the same weight as adults as Western Grey Kangaroos babies, how much would a human newborn weigh?

Set up a proportion of adult weight to baby weight where n is the weight of a human baby:
30000/1 = 150/n

Using our proportion calculator, we get:
n = 0.005 or 1/200 of a pound