{name, "fraction"}.
{jsx, [start_array,start_array,
 {float,2.0},
 end_array,
 {float,2.0},
 start_object,
 {key,"key"},
 {float,2.0e7},
 {key,"another key"},
 {float,2.0e7},
 end_object,start_object,
 {key,"key"},
 {float,2.0},
 {key,"another key"},
 {float,2.0},
 end_object,
 {float,4.2},
 end_array,end_json]}.
{json, "fraction.json"}.