Let a number = n
n(7) = 48
isolate the n. Divide 7 from both sides
n(7)/7 = 48/7
n = 48/7
Divide
n = 6.857 is your answer
hope this helps
3.9 * 5.3 ≈ 4 * 5
≈20
Well after doing your multiplication, you can place your decimal point by knowing that from estimation the answer is around 20.
So you can place your decimal point after the first two digits from the left.
15 = 3 x 5
33 = 3 x 11
so
GCF = 3
