* {
  box-sizing: border-box;
}

.price {
  width: 55px;
  height: 55px;
  border-radius: 50%;
  background-color: green;
  display: flex;
  align-items: center;
  color: #fff;
  }

.price, .price * {
  margin: 0;
  padding: 0;
}
    
.price p {
  font-size: 24px;
  display: flex;
  margin: 0 auto;
 }
 
 .price p sup {
  font-size: 12px;
 }