what is 31 plants in 11 rows = 21 plants in ––—

in need help

31 plants in 11 rows = 21 plants in x rows.

31/11=21/x

Cross Multiply

31x=21(11) = 231

31x=231

Divide by 31 on both sides. 

231/31 = 7.4516129032258065

x=7.4516129032258065

So 21 plants fit in approximately 7.5 rows, but we cant have a half of a row, so they fit in 8 rows.