56:3

Do you mean:

• 56 ÷ 3, or
• the ratio 56:3?

If 56 ÷ 3:

• 3 into 56 goes 18 times (3×18=54), remainder 2
• So 56/3 = 18 with remainder 2 = 18 2/3 = 56/3 ≈ 18.6667

If the ratio 56:3:

• It’s already in simplest form (gcd(56,3)=1). You can also write it as 56/3 or 18 2/3.