design-themes/theme_odoo_experts/views/snippets/s_big_number.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

<template id="s_big_number" inherit_id="website.s_big_number">
    <!-- Section -->
    <xpath expr="//section" position="attributes">
        <attribute name="style">background-image: linear-gradient(60deg, var(--o-color-5) 0%, var(--o-color-1) 100%);</attribute>
        <attribute name="data-oe-shape-data"/>
    </xpath>

    <!-- Shape -->
    <xpath expr="//div[hasclass('o_we_shape')]" position="replace"/>

    <!-- Text -->
    <xpath expr="//h2/div" position="attributes">
        <attribute name="style" add="font-size: 7.75rem;" remove="font-size: 10.75rem;" separator=";"/>
    </xpath>
    <xpath expr="//h2/div" position="replace" mode="inner">
        90%
    </xpath>
</template>

</odoo>