25/60 x 15/50
(25x15) (60x50) = 375/3000 = 1/8
Because 3000 divided by 375 is 8 so it would be 1/8
Answer: 112 km
=====================================================
Work Shown:
(5 miles)/(8 km) = (70 miles)/(x km)
5/8 = 70/x
5*x = 8*70 ... cross multiply
5x = 560
x = 560/5 .... divide both sides by 5
x = 112
According to the given estimation, 70 miles converts to 112 km.
The more accurate conversion is approximately 70 miles = 112.65408 km, so this estimation isn't too far off.
108 x 100/75 = 108 x 1.25 = 144
108 is 75% of 144.
Hope this helps :)