3/4 x 4/5 = 12/20 = 6/10 = 3/5 or three fifths
Notice that the fours cancel out. Think about writing it as:
3 x (1/4) x 4 x (1/5) = 3 x [(1/4) x 4] x (1/5) = 3 x [1] x (1/5) = 3 x (1/5) = 3/5.
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2 fourths times four fifths is 2 fifths.
1 7/20
No, two fifths is smaller the three fourths. It would only be 8/20ths while three fourths would be 15/20ths.
3/4 * 4/5 = 3/5 or 0.6
three tenths.