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Popular Word Problems >

This week, Brendan ended up needing 9 gallons of gas. That is 10% less than he needed last week. How much gas did Brendan need last week?

Solution

T hi s w ee k, B re n d an e n d e d u p n ee d in g 9 g a ll o n s o f g a s . T ha t i s 10% l ess t han h e n ee d e d l a s t w ee k . Ho w m u c h g a s d i d B re n d an n ee d l a s t w ee k ?

Solution

Amount before reduction : 10

Solution steps

Translate the problem into an equation:

9 = x - 0.1 x

9 = x - 0.1 x : x = 10

Amount before reduction : 10

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