In his phone gallery, Malachi has the number of selfies he took last year and this year in the ratio of 10:17. If he has 2430 photos in his gallery, how many more photos did he take this year than last year?
The total ratio representing the number of photos in the Malachi gallery is 10+17=<<10+17=27>>27
The difference in the ratios representing the number of photos Malachi took this year and last year is 17-10=<<17-10=7>>7.
This year, Malachi took 7/27*2430= <<7/27*2430=630>>630 more photos than he took last year.
#### 630