This is an equation.
See attachment for math work and answer.
It is simple 3.4, 4.3, 4.7, 7.4
9/15. There are 15 cards and 8 of them are odd and 1 is a 2.
Make an equation.
80% = 0.8
'of' is multiplication
'what number' is 'x'
'is' is an equal sign
0.8 * x = 64
0.8x = 64
Divide 0.8 to both sides:
x = 80