at a local grocery store, a bottle of water costs 1.25 . At a baseball stadium, the cost of a bottle of the same brand water increases by 80%. What is the cost of a bottle of water at the stadium in dollars and cents?

解

a t a l oc a l g rocery s t ore, a b o ttl e o f w a t er cos t s 1.25 . A t a ba se ba ll s t a d i u m, t h e cos t o f a b o ttl e o f t h e s am e b r an d w a t er in cre a ses b y 80%. Wha t i s t h e cos t o f a b o ttl e o f w a t er a t t h e s t a d i u m in d o ll a rs an d ce n t s ?

Amount after addition : 2.25

解答ステップ

Translate the problem into an equation:

x = 1.25 + 0.8 \cdot 1.25

x = 1.25 + 0.8 \cdot 1.25 : x = 2.25

Amount after addition : 2.25