A chemical solution is 3/5 acid. If 2 liters of water are added to 8 liters of the solution, what fraction of the new solution is acid?, A company owns 2/3 of a mine. They sell 1/4 of their share. What fraction of the entire mine do they still own?, A tank is 3/4 full. If 1/3 of the water is removed, what fraction of the tank is now full?, A nut mix is 2/5 almonds, 1/3 cashews, the rest walnuts. What fraction are walnuts?, Increase a number by 2/3, then decrease the result by 1/4. What fraction of the original is the final result?, Two trains 300 km apart travel towards each other. One at 80 km/h, the other at 70 km/h. How long until they meet?, A boat goes downstream at 15 km/h, upstream at 9 km/h. What is the boat's speed in still water?, A car travels half a journey at 60 km/h, the other half at 80 km/h. What is the average speed?, A plane flies 1200 km in 4 hours with a 50 km/h tailwind. How long is the return trip with the same headwind?, Two cyclists start at the same point. One goes north at 16 km/h, the other east at 12 km/h. How far apart after 2.5 hours?, A runner completes 2/5 of a 42.2 km marathon in 1 hour 15 minutes. At this pace, how long for the whole marathon?, A car travels 3/4 of 240 km at 80 km/h. The rest takes 1.5 hours. What's the average speed for the whole trip?, A train travels 2/3 of its journey at 90 km/h, then 1/3 at 60 km/h. The whole trip takes 5 hours. What's the total distance?, A boat travels 1/3 of a 180 km journey downstream at 12 km/h, then returns upstream at 8 km/h. What's the total round trip time?, A cyclist travels 2/5 of a 60 km route at 15 km/h, then increases speed by 1/3 for the rest. What's the total time?.

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