a 70 cm long wire is to be cut into two pieces so that one piece will be 2 / 3 th of the other , how many centimeters will the shorter piece be ?
"1 : 2 / 3 = 3 : 2 2 / 5 * 70 = 28 answer : c"
subtract(70, divide(70, add(divide(2, 3), const_1)))