Yes, 2/7 and 6/21 are equivalent. 2/7 * 3/3 = 6/21. Since 3/3 is the same as 1, we know the fractions are equivalent.
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It is six over seven.
80.056/0.7:= 56 ÷ 0.7= 80.0 in decimal
¾
six hundred and twenty-one point nine
fifty-three over fifty-six