Replace the relevant numerals in the following sentences with the correct word from the above box. They reduced the budget by $1m 40 years later. 1/2 of the people who attended in 1961 had never attended a concert before. 60% of students report using the library in term time only and 1/4 of those use the library at night. The population rose by 3.5 billion in the next 15 years. Over 15 million planes landed at the airport in the last seven months; this is an increase of 1/3 .