Question

A studio apartment in Coast City costs $400 per month. Next year the rent goes up 22%. What is the new rent per month?

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Answer 1

18 r 4

Explanation:

1) 40

`40 / 22\% \: = 8 \: r \: 4 \: \\ 8 * 22\% = 176 \: 180 - 176 = 4`

2)

`40 / 22 \: = 1 \: r = 18 \\ 1 * 22 = 22 \: 40 - 22 = 18`

`22 √(400) = 18r4`