A smartphone seller is offering a discount of 5% off for customers who buy at least 2 smartphones at once. Melinda, Zoe and Joel want to buy an iPhone X each. If an iPhone X costs $600, how much can they save by pooling their money together and buying three iPhones at once from this seller rather than buying individually?
How much would three iPhone Xs cost without the discount? ** Each iPhone X cost $600 so three iPhone Xs without the discount would cost 3*$600 = $<<3*600=1800>>1800
How much do they get to save by buying collectively? ** The discount is 5% and 5% of $1800 is (5/100)*$1800 = $<<5/100*1800=90>>90 which is what they get to save by buying collectively.
#### 90