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The price of a ring was increased by 9% to £1800. What was the price before the increase? Give your answer to the nearest penny.

Respuesta :

mathmate

Answer:

see steps

Step-by-step explanation:

New price  was increase from 100% to 109% at £1800.

By proportionality,

old price / 100% = 1800 / 109%

Cross multiply to get

old price = $1800 * 100% / 109% = £1651.38
I do not know just need answers really hard questions

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