100:1000

Simplified: 1:10

Reason: gcd(100, 1000) = 100. Divide both terms by 100 → 100/100 = 1 and 1000/100 = 10.

Other representations:

• Decimal: 0.1
• Fraction: 1/10
• Percentage: 10%

Tip: To simplify any ratio a:b, divide both by gcd(a,b).