Undefined variable: prodyy (View: D:\OSPanel\domains\111\resources\views\main-qaz.blade.php)

Вот код в котором ошибка:

@isset($prod)
                        @foreach ($prod as $prods)
                        <div class="item">
                            <div class="product-thumb transition">
                                <div class="image product-imageblock"> <a href="{{ route('products.show', ['product' => $prods->id]) }}"><img src="{{ asset('/storage/' . $prods->file) }}" alt="iPod Classic" title="iPod Classic"

 class="img-respons
                                    <div class="caption product-detail">
                                        <h4 class="product-name">{{$prods->name}}</h4>
                                        <p class="price product-price">&#8381 {{$prods->price}}  <span class="price-old">{{$prods->old_price}}</span></p>
                                        <div class="rating">Sale:  {{$prodyy}}%</div>
                                    </div>
                                </div>
                            </div>
                            @endforeach
                            @endisset

Где я ошиблась?