Question

a magazine has 5580000 subscribers this year. This number is down 7% from last year. How many subscribers were there last year?

Answer 1

Let s=number of subscribers last year.

s(100-7)/100=5580000

93s/100=5580000 multiply both sides by 100

93s=558000000 divide both sides by 93

s=6000000 (that's 6 million subscribers last year)

Answer 2

`5580000=0.07*\alpha` being that
`\alpha` is the original value of subscribers the previous year.
To find, divide:
`558000/0.07\approx79714285.71` which rounds to
`79714286` subscribers.