16.22 because two twenty dollar Bill's equals 40 then subtract 23.78 which equals 16.22
Answer:
20 : 28
5 : 7 = 20 : 28. And 7 is a fourth of 28.
I think its times 10 *shrug*
Answer:
10
Step-by-step explanation:
do prime factorizations of each number and multiply the common factors
20 = 2 · 2 · 5
30 = 2 · 3 · 5
common factors are 2 and 5
multiply them to get 10
