Is 7/8 Bigger Than 1/10?

Method 1: Common Denominators

To compare these fractions, we need a common denominator. The denominators are 8 and 10, and the least common denominator (LCD) is 40.

• Step 1. Convert \(\frac{7}{8}\): multiply numerator and denominator by 5.
  \[\frac{7}{8} = \frac{7 \times 5}{8 \times 5} = \frac{35}{40}\]
• Step 2. Convert \(\frac{1}{10}\): multiply numerator and denominator by 4.
  \[\frac{1}{10} = \frac{1 \times 4}{10 \times 4} = \frac{4}{40}\]
• Step 3. Compare the numerators: 35 vs 4.
• Step 4. Since 35 is greater than 4, we know that \(\frac{7}{8} > \frac{1}{10}\).

Method 2: Cross Multiplication

A quicker way to compare fractions is to cross-multiply. Multiply each numerator by the other fraction's denominator:

• Step 1. Multiply the numerator of the first fraction by the denominator of the second: \(7 \times 10 = 70\).
• Step 2. Multiply the numerator of the second fraction by the denominator of the first: \(1 \times 8 = 8\).
• Step 3. Compare the products: \(70 > 8\), so \(\frac{7}{8} > \frac{1}{10}\).

Method 3: Decimal Comparison

Convert each fraction to a decimal by dividing the numerator by the denominator:

Since 0.875 is greater than 0.1, we confirm that \(\frac{7}{8} > \frac{1}{10}\). In percentage terms, \(\frac{7}{8}\) is 87.5% and \(\frac{1}{10}\) is 10%, a difference of 77.5 percentage points.

Why Does This Work?

These fractions have different numerators and different denominators, so we can't compare them directly. By converting to a common denominator of 40, we're cutting both quantities into equal-sized pieces. Then 35 pieces vs 4 pieces is a straightforward comparison.