What is 7/10 × 4/21. make sure to show your work.

187/210

Step-by-step explanation:

The fractions have unlike denominators. First, find the Least Common Denominator and rewrite the fractions with the common denominator.

LCD(7/10, 4/21) = 210

Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1.

(7/10×21/21)+(4/21×10/10)=?

Complete the multiplication and the equation becomes

147/210+40/210=?

The two fractions now have like denominators so you can add the numerators.

Then: 147+40/210=187/210

This fraction cannot be reduced.