r = (s2-s1)/s1*100
print('%.1f%%' % r)
print(f"{r:.1f}%")
print("{:.1f}%".format(r))
print("{0:.1f}%".format(r))
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HEIN音响
r = (s2-s1)/s1*100
print('%.1f%%' % r)
print(f"{r:.1f}%")
print("{:.1f}%".format(r))
print("{0:.1f}%".format(r))