Question

A jar of coffee used to contain 520g.

New packets contain one-fifth less
workout how much the new packet contains

Answer 1

If old packet contained 520g and new packet contains 1/5 less, then the new packet has 80% of the old packet

80% = 0.8

520 x 0.8 = 416g

20% = 0.2 = 104g

520 x 0.2

416 + 104 = 520

So the new packet contains 416g of coffee.