Subtraction: 7/10-2/3=

To solve the subtraction of fractions:
$$
frac{7}{10} – frac{2}{3}
$$

Step 1: Find a common denominator.
The least common denominator (LCD) of 10 and 3 is 30.

Step 2: Convert each fraction to have denominator 30.
$$
frac{7}{10} = frac{7 times 3}{10 times 3} = frac{21}{30}
$$
$$
frac{2}{3} = frac{2 times 10}{3 times 10} = frac{20}{30}
$$

Step 3: Subtract the fractions.
$$
frac{21}{30} – frac{20}{30} = frac{1}{30}
$$

Answer:
$$
frac{1}{30}
$$

Reference: Standard arithmetic rules for subtracting fractions with unlike denominators.