function savings(input) {
    let incomePerMonth = parseFloat(input.shift());
    let months = parseInt(input.shift());
    let personalExpenses = parseFloat(input.shift());

    let moneyLeft = incomePerMonth - personalExpenses - (incomePerMonth * 0.3);
    let maxPercent = ((moneyLeft / incomePerMonth) * 100).toFixed(2);
    let sum = (months * moneyLeft).toFixed(2);

    console.log(`She can save ${maxPercent}%`);
    console.log(sum);
}

//savings([ '1500', '3', '800' ]);