Respuesta :
between this two years that's 2001 and 2007 there is 1/3 over 2/7
for as to get the total number 1/3 divide 7/2=1,1/6 billions of people
for as to get the total number 1/3 divide 7/2=1,1/6 billions of people
Subtract the starting population from the increased population:
1/3 -2/7
Rewrite the fractions to have a common denominator:
7/21 - 6/21 = 1/21 billion increase.