cant see 1 & 5 ...will answer the rest ..
2. => 2/5*35
=> to multiply fractions we multiply the numerators ( top numbers ) with each other and the denominators (bottom numbers ) also the same way ...
=>here we have 2/5 and 35 ...35 has a denominator which is 1 ...
=> so 2/5*35/1 = 70/5 => 14 ..
3.=> 5/6*4
=>same way ...5*4/6 => 20/6 => 10/3 => 3 1/3
4.=> 7/16 * 8
=> 7*8/16 => 56/16 => 7/2 => 3 1/2 ..
hope u can do the others also now ...
Hope it helps !!!