Consider an economy with the following IS curve: 𝐼 𝑆 : 𝑌 ~ 𝑡 = 𝑎 ¯ − 𝑏 ¯ ( 𝑅 𝑡 − 𝑟 ¯ )   Suppose we assume 𝑎 ¯ = 0.03 , 𝑏 ¯ = 1 , 𝑅 𝑡 = 𝑟 ¯ = 0.045 . Let Δ 𝑌 ~ 𝑡 = 𝑌 ~ 𝑡 − 𝑌 ~ 𝑡 ′ , where 𝑌 ~ 𝑡 is short-run output when the real interest rate equals 𝑅 𝑡 and 𝑌 ~ 𝑡 ′ is short-run output when the real interest rate equals 𝑅 𝑡 ′ . If the real interest rate falls from 𝑅 𝑡 to 𝑅 𝑡 ′ = 0.02 , then Δ 𝑌 ~ 𝑡 = ______ percent. Round your answer to the nearest tenth of a percent.