You can usually just use the eq matched to compare two numbers:

expect(deal.total).to eq(120)

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If the actual value is a BigDecimal, you might have issues when you match it against a Float:

expect(deal.total_price).to eq(1200.99)

In these cases, try matching it against another BigDecimal:

expect(deal.total_price).to eq BigDecimal(1200.99)

If you don't like the syntax, our rspec_candy Show archive.org snapshot gem has a matcher that will compare Fixnums (integers), Floats and BigDecimals with each other:

expect(deal.total_price).to be_same_number_as(1200.99)

This compares the numbers' #to_s representation.