Answer:
1/15
Explanation:
To multiply fractions, you simply multiply the numerators (the top numbers) together and the denominators (the bottom numbers) together. So, for the expression:
(2/21) * (7/10)
You multiply the numerators and denominators as follows:
(2 * 7) / (21 * 10) = 14 / 210
Now, you can simplify this fraction by finding the greatest common divisor (GCD) of 14 and 210, which is 14. Divide both the numerator and denominator by 14:
(14 ÷ 14) / (210 ÷ 14) = 1/15