Income of Avin is 5/8 of the income of Bina. Avin's expenses are one-half of those of Bina, and Avin saves 40% of his income.What percentage of her income does Bina save?
There is something I don't understand about algebra: It has been around for thousands of years, yet no one has ever found out what the value of "x" or "y" really is.
Richard van der Merwe
mathematics is like puzzle and it improves our brain sharpness