The number of grandchildren that Eva has is 21.
A fraction is a quantity that is not a whole number. In maths, a fraction usually has a numerator and a denominator. An example of a fraction is 2/7. 2 is the numerator and 7 is the denominator.
In order to determine the fraction of the grandchildren that live in Australia, subtract the fraction of the grandchildren that live in Wales from 1.
1 - 2/7 = 5/7
Number of grandchildren = 15 ÷ 5/7
15 x 7/5 = 21
To learn more fractions, please check: https://brainly.com/question/25779356
