<div class="block"></div>

body{
  margin: 0;
}
.block{
	height: 200px;
	width: 100%;
	position: relative;
	background: linear-gradient(to right, rgba(241,231,103,1) 0%, rgba(254,182,69,1) 100%);
}
.block:after{
	content: '';
	width: 100%;
	height: 100%;
	position: absolute;
	background: inherit;
	z-index: -1;
	bottom: 0;
	transform-origin: right bottom;
	transform: skewY(-3deg);
}