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in a grade 7 class, 36 students are either members of the math club or science club or both. 10 students are members of both clubs. if 31 students are members of the math club how many are members of the science club?

Carla had twice as much money as Vida. After carla gave 12 pesos to vida,carla still had 10 pesos more than vida. how much was the total money of the 2 girls in the beginning?

The area of a right triangle whose hypotenuse is 15cm and whose height is 12cm is 54sq. cm.What is its perimeter?

if n=2^2x3^2x7 and m is a natural number,how many possible values can m have at the most such that n/18m is a whole number?

the sum of all numbers 1-100

the sum of 2+4+6...800

find the number of terms 14,21,28,35.....6293

Mr cruz finds that he can travel 12 km per liter of gasoline. After the tune up of his engine, he uses only 4/5 as much gasoline. how much farther in km can he now ride on one liter of gasoline?

When the price of an article is reduced by 5/8 of its former value, the number of article sold is increased to 32/27 of the original amount. The present daily revenues is what fraction of the original?

Loyola heights has 3000 phones of which 3/5 are dial phones. If 2/3 of these dial phones are replaced by digital phones and 400 additional phones are installed, what fraction of the phones are digital now?

Can you please enlighten more how it is. Thank you.

1600/3400=.4705 * 100 =47 key said 2/5.