[EN Percent] Resolution is null for entity in sentences like "percentage higher than 32.5%"

[gooooloo]

Describe the bug Resolution value is null in return value of Microsoft.Recognizers.Text.Number.NumberRecognizer.RecognizePercentage("percentage higher than 32.5%", "en-us")

Expected behavior

1. The resolution value should be 0.325 or "32.5%"

Sample input/output

Platform (please complete the following information):

• Platform: .NET
• Environment: NuGet
• Version of package v1.8.5

Additional context

1. it works in v1.8.5 if the question is without word "percentage", i.e. Microsoft.Recognizers.Text.Number.NumberRecognizer.RecognizePercentage("higher than 32.5%", "en-us")
2. it works in v1.7.0 Microsoft.Recognizers.Text.Number.NumberRecognizer.RecognizePercentage("percentage higher than 32.5%", "en-us")