# Increase in number

• If the amount is increased, the amount is increased, but when the pressure is 10, if downwards, the amount is 300, and it should be 100. How do you fix that?

``````\$("#kol").change(function() {
nV = \$(this).val();
oV = this.name;
this.name = nV;
p = \$(this).parent().parent();
kol = \$("#kol").val();
showsum = \$("#sum").val();
sum = \$("#realsum").val();

if(nV &gt; oV) {
mul = parseInt(sum) + parseInt(showsum);
} else {
mul = parseInt(showsum) - parseInt(sum);
}

res = p.find("#sum");
res.html(mul);
total = 0;
\$("#sum").val(mul);

});``````
``````<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.2/jquery.min.js">
</script>
Количевство: <input type="number" id="kol" min="5" value="5" step="5"><br><br>
Сумма:
<input type="hidden" id="realsum" value="100">
<input type="text" id="sum" min="100" value="100">
руб``````

• ``````\$('#num').change(function() {
\$('#sum').text(this.value * this.name / this.min);
});``````
``````<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">
</script>
Количество <input id='num' type='number' value='10' min='10' step='10' name='100'>
<br>
Сумма: <span id='sum'>100</span>``````

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