James says he has 3/4

This doesn’t make sense to me it’s supposed to be lcm ( least common multiple )

Igor stravinsky tires sells approximately 3,760,000 car tires and 1,200,000 truck tires each year. about 47,000,000 care tires and 26,000,00 truck tires are sold each year in the united states. what is stravinsky's market share in each of these two markets (cars and trucks)?

Equation for the calculation double 2 and then add 5