How many times 1 / 4 equals 51
1/4*x=51
4*(1/4*x)=4*51
x=204
Calculation: 24 × 51 / 13 + 51 × 19 / 43
24×51/43+51×19/43
=(24+19)×51/43
=43×51/43
=51
One seventh and two sixths
1 2 6+14 22 11
-- + -- = -------- = ---- = ----
7 6 42 42 21
Find the least common multiple (42) of 7 and 6
Place 42 at the denominator
If you look at the denominator of the original fraction, 7 and 6. Then 7% is 42, which is its molecule. So is 2 / 6
One has () one seventh, two has () one ninth
There are (7) one seventh in 1,
1 / 7 = 7
There are (18) ninths in two
1 / 9 = 18