Posted by Pierre on .
how do you figure out the fraction a+1/6=3/5

math 
MathMate,
a+1/6=3/5
subtract 1/6 on each side:
a+(1/6)(1/6)=(3/5)(1/6)
a=(3/5)(1/6)
The common denominator is 30, so
a=(3*6/30  1*5/30)
=(185)/30
=13/30