16 times 2 is 32. 81-32 is....49. Did I answer your question?
No, if you convert 3/5 and 3/7 into like fractions, you would get 3/5=21/35 and 3/7=15/35 therefor, you will need 6/35 kilogram more flour.
My teachers taught me a trick make a C from the top to bottom
so 5 1/2 would be
5 times 1 + 2 so denominator stays the same so it 7/2.
bottom one is 22/4
make a C from top to bottom and multiply outer number to top add the bottom to that then keep denominator the same.
Hope i helped.
the sum of inner angles of a pentagon is equal to

so:

and the largest one is 150

the answer is 1/16

the parallel line can be
y=2x+4
or any line with different y intercept
good luck