Question

Anjum and Betty spent a total of 9 hours completing the puzzle.

The ratio Anjum’s time : Betty’s time = 7 : 5.
Work out how much time Anjum spent on the puzzle.

Answer 1

7 : 5 equals to 9 in total
So
7+5=12
9 divided by 12 is 0.75
Ahjum = 7
Betty = 5
The time Ahjum spent on the puzzle is
7 * 0.75 = 5.25